Category: NP-Optics Guide

With the development of technology, the performance of thermal scopes has advanced rapidly in recent years. Larger infrared detector arrays, more powerful image processing algorithms, more complex functions and UI interfaces, and larger display screens — all these technological upgrades that bring hunters a more comfortable experience are actually power-hungry. A larger infrared sensor array means more signal data; a clearer image means more precise calibration and collection of more parameters such as XYZ axes; a larger display also requires more power. All of this puts pressure on battery life.

The 18650 lithium-ion battery is the most common power source for thermal scopes. The 18650 covers all lithium batteries with a diameter of 18mm and a length of 650mm, and the capacity of these batteries varies widely based on our years of experience. Today, we took several common types of 18650 batteries and tested them. Our experimental data shows that the approximate capacity of these batteries ranges from 980mAh to 3300mAh. In particular, a battery labeled as 9800mAh showed extreme false advertising, with a true capacity of only 980mAh. We recommend that you do not trust exaggerated marketing claims and instead choose certified 18650 batteries with a stated capacity not exceeding 3300mAh.

How long can a thermal scope run on two 18650 batteries?

When testing the power consumption of various thermal scope models, we found that most 384×288 resolution thermal cores consume about 1.8W, while most 640×512 resolution thermal cores consume about 2.2W. The average voltage of an 18650 battery is U=3.7V. Two 3000mAh 18650 lithium batteries can support a 640 thermal scope for approximately 8 hours, while a 384 resolution thermal scope can run for more than 10 hours.

What factors affect battery life?

1. At lower temperatures, lithium battery capacity is greatly reduced. At 0°C, capacity is about 75% of room temperature capacity; at -10°C, it drops to about 55%; at -20°C, it reaches only about 40% of the rated capacity. This is why when we hunt in the early morning hours of winter, even with two batteries, a thermal scope may only work for 4 to 5 hours.
2. More complex temperature changes cause thermal scopes to perform calibration more frequently. Sometimes, the smaller the temperature difference in the background, the weaker the signal reaching the infrared detector, and the more noise there is. To reduce noise, the thermal scope performs more calculations and processing. These factors increase power consumption and shorten battery life.
3. Frequent use of the laser rangefinder and ballistic calculator requires a large amount of power to emit the laser and compute impact point parameters. This is one of the largest power demands among all UI functions.
4. Electronic compass. Today’s thermal scopes commonly come with a six-axis electronic compass (gyroscope). The electronic compass operates continuously, and turning it on increases overall power consumption by about 0.2 to 0.3W.
5. Brighter LED display. For a display with the same resolution, power consumption rises and falls with brightness. We do not recommend that shooters always keep the brightness at maximum when using a thermal scope. On one hand, it increases power consumption; on the other hand, after the user’s eyes leave the screen, it takes longer to readapt to the ambient darkness.

Suggestions to extend your battery life of thermal scope: use external power supply devices like EPS-A1 rifle mounted battery compartment can effectively extend your thermal scope running time by 4~6hours!

When choosing a thermal scope, many hunters only look at the resolution numbers but do not understand the meaning behind those numbers. As a result, they often find themselves struggling over the “384 vs 640” question. Today, we are here to give you a complete and correct explanation of thermal scope resolution once and for all, so that you can get a clear answer based on your own needs.

First, we need to understand that numbers like 640×512 and 384×288 represent infrared detectors with different array sizes. Based on optical principles, each has its own strictly defined optimal application scenario. If you choose the wrong parameters, a hunter will either spend extra money on a high-end configuration that they cannot make use of, or pick a lower-end one that fails to achieve the desired long-distance requirement. Below, we will explain the principles clearly, and then use the real-world cases of two customers to give you the best guide for choosing between 384 vs 640.

To make it easier to understand, we have created an optical path comparison diagram. The upper and lower paths show how a 384×288 detector and a 640×512 detector perform at the same target distance and with the same objective lens focal length — specifically, their FOV performance and signal reception.

At the same focal length, the 640×512 detector array at the bottom can fully receive all the light signal projected by the distant target through the objective lens. In contrast, the effective area of a 384×288 detector is only about half the size of the 640×512 detector, so it can only capture part of the light signal projected by the target. More of the light signal, after passing through the objective lens, falls outside the 384×288 array. In other words, pairing a small detector with a large lens is a waste. The role of lens focal length is very direct: the longer the focal length, the higher the magnification and the stronger the long-range detail resolution, making it suitable for locking onto small targets at ultra-long distances; the shorter the focal length, the wider the field of view, making it faster for close-range scanning and more flexible for tracking. However, the lens must be perfectly matched with the corresponding detector resolution in order not to waste optical performance.

On the question of how to choose between 384 and 640 thermal scopes, two of our users made completely different choices.

Tommy lives in Virginia and has four years of coyote hunting experience. He hunts year-round in the hilly, densely forested areas of the Appalachian Mountains, where there is a lot of terrain obstruction and his effective shooting distance is consistently within 200 meters. All his shooting techniques and habits are built around short-range precision. He told me that for shooting needs within 200 meters, the pixel density of 384 resolution is completely sufficient—the image is clear with no pressure, and there is no need for a higher pixel count. Paired with a 35mm or 42mm standard focal length lens, it perfectly matches the small array of the 384, utilizing 100% of the lens performance. The field of view is suitable for fast searching in dense woods, the body is lighter, and the battery life is longer. Within a 200-meter shooting range, there is no noticeable difference in image quality between a 384 setup and a 640 setup. Choosing 640 would be completely overkill and unnecessary expense. Therefore, he chose our Rhino335L thermal scope and is very satisfied with it.

Now look at Bob, who also has four years of hunting experience, but his scenario and needs are completely different. Bob hunts wild hogs on the open plains of Texas — no obstruction, wide-open FOV, and 300 to 400 meter long-distance shooting is routine for him. He told us that the core needs for killing wild hogs in Texas are to see far, identify clearly, and lock onto target details at long distances. At this distance, the inherent shortcomings of the 384 detector cannot be overcome. Even if forcibly paired with a long focal length lens, the array size is too small, wasting lens performance. The long-distance image becomes pixelated, target outlines are blurry, and details cannot be judged, directly affecting hit probability. The larger sensing array of the 640 detector can perfectly match a long focal length lens, fully receiving all the imaging light from the lens and fully utilizing the long-distance resolving power of the long lens. At distances of 300 to 400 meters, it still delivers a sharp and detailed image, allowing precise locking onto the silhouette and posture of a coyote. For Bob, 640 product like our Rhino645L is not a premium up-sell; it is a necessity for long-distance hunting. No matter how large a lens you pair with a 384 setup, it cannot meet his real-world needs.

To sum up: for short distances, use 384×288 paired with a short focal length lens — best value, practical and sufficient. For long-range open plains, choose a long focal length lens paired with a 640×512 infrared detector — you can see far and have a wider field of view(FOV). Now, on this question of 384 vs 640, do you have your answer?

Choose 384 If:

• budget limited
• short range hunting
• beginners

Choose 640 If:

• long distance hunting
• professional predator control
• better detail needed

As a specialized manufacturer of hunting optics, Novelty Point Optics actively collaborates with global sight brands through professional OEM and ODM services.

Our core strength is clear: delivering reliable, high-performance thermal scopes at highly competitive prices. We believe the best partnerships are built on playing to each self strengths – we focus on what we do best: R&D and scalable manufacturing. Our partners handle market development, brand building, and customer relationships, while we provide full pricing and service support.

End-to-End OEM/ODM Services from NPO

We cover every stage of product development: product positioning, industrial design, mold tooling, trial production, custom UI, and final packaging. Our services span:

• Thermal scopes
• Red dot sights
• Night vision products

To help you understand our collaboration model, here is a step-by-step walkthrough using a thermal scope co-development example.

Step 1: Product Positioning (1-2 weeks)
Based on your requirements, we define the product across five dimensions: cost, core specifications, ID features, special function, and production timeline. This phase ensures both sides share a clear target.

Step 2: Concept Design & Comparison (Free of Charge)
Once the positioning is approved, we typically provide two design options for function and performance comparison. NPO charges no fees at this stage, demonstrating our commitment to genuine partnership.

Step 3: Detailing & Engineering Validation
After you select a design, we refine the details. We use 3D printing to produce appearance mockups for visual and ergonomic evaluation. Separately, we build functional engineering prototypes using 3D-printed housings to demonstrate image quality, response speed, operational features, and core parameters. You can test these prototypes hands-on. Once ID and function are confirmed, we move to the most critical phase: mold tooling.

Step 4: Mold Tooling & Sample Production (3-4 weeks)
In this phase, we invoice for design, tooling, and sample costs. Tooling fees are approximately $10,000 USD, for which you receive about 10 complete structural housing sets. We then agree on sample pricing and future mass-production pricing. After you pay for the 10 samples, we begin tooling – typically a 3-4 week process.

Step 5: Prototype Assembly & Live-Fire Testing (4-6 weeks)
Once the housings are ready, we assemble approximately 10 prototypes. These undergo extensive live-fire testing, followed by minor revisions based on test results, leading to final design freeze.

Step 6: First Order & Minimum Order Quantity (MOQ)
After you approve the final prototypes, we negotiate the first production order. Our OEM/ODM first order MOQ is 100 units. This balances production cost efficiency without imposing excessive financial pressure. In contrast, some manufacturers require MOQs above 400 units, which often kills promising products before they launch.

Our Commitment: Unique Products, Strict Confidentiality

All products developed through our OEM/ODM partnerships are covered by agreements guaranteeing product uniqueness for each client. We treat commercial confidentiality as our highest priority. Throughout your cooperation with Novelty Point Optics, we steadfastly protect your business interests.

Whether you are a startup or an established brand, if you have custom requirements for thermal, red dot, or night vision products, we look forward to starting a mutually beneficial partnership with you.

Among all firearm-mounted electronic devices, recoil is the single greatest external factor affecting product lifespan and aiming precision. For a thermal riflescope, shock resistance is particularly critical. Designers and engineers optimize every component—the housing, internal brackets, germanium lens protection, and detector packaging—to ensure accuracy and reliability across various firearm platforms. The culmination of all these efforts is our impact resistance testing.

At Novelty Point Optics, we go beyond assigning a simple impact force value to our products. We employ a more scientific and precise approach: testing by fully simulating real firearm recoil.

Due to China’s strict firearm regulations, conducting live-fire tests locally is challenging. To overcome this, our General Manager, Mr. Harry, has traveled multiple times annually to the United States since 2024 to conduct live-fire testing on mainstream rifle platforms. During these sessions, he uses vibration sensors to capture complete recoil data—not just peak G-force, but the full waveform, including amplitude, duration, and temporal characteristics of the recoil event.

These valuable datasets are brought back to China to calibrate our custom-built vibration test rigs. By accurately reproducing the recoil waveforms captured in the field, we can validate the durability of our thermal scopes, red dot sights, and external battery packs under realistic conditions.

We believe superior products emerge from meticulous attention to every detail. From waterproofing to shock absorption, from material selection to structural design, NPO’s relentless optimization across all dimensions ensures that whether in the field, on a mission, or on patrol, our thermal imaging scopes deliver the confidence and reliability shooters demand. Because true reliability isn’t a single number from a lab—it’s holding zero, shot after shot, against the full force of real recoil.

Modern firearms and optics are undergoing a profound transformation—becoming more electronic, networked, and intelligent. An increasing number of devices are now integrated onto rifle platforms, forming comprehensive, powerful systems. These typically include:

• Thermal scopes
• Digital night vision scopes
• Red dot sights
• Ballistic computers
• Weapon lights
• Laser aiming modules
• External power supplies

Unlike traditional optical sights, these electronic devices must withstand more than just vibration and extreme temperatures. They face an even tougher challenge: IP68 ingress protection rating.

What is IP68? IP68 stands for “Ingress Protection 68,” a standard established by the International Electrotechnical Commission (IEC). The two digits signify:

• First Digit (Dust Protection, 0-6): 6 is the highest level, meaning totally dust-tight. Dust cannot enter the device or affect its operation.
• Second Digit (Water Protection, 0-9): 8 is among the highest common ratings for consumer electronics, meaning the device can be continuously submerged in over 1 meter of water without damage.

In simple terms, IP68 means: Dust cannot enter; water cannot penetrate.

At Novelty Point Optics, every electronic device we manufacture—whether it’s a thermal riflescope, a red dot sight, or the EPS-A1 external power supply—undergoes rigorous IP68 testing. But our approach differs from many others. In China, numerous manufacturers use in-house testing platforms to conduct their own experiments, then simply declare their products IP68 compliant. We do not take this path. We choose a more difficult—but far more trustworthy—route: We submit all our products to renowned third-party testing laboratories. Independent professionals conduct the tests and issue official certification reports. Why?

Because IP68 is not a slogan; it’s a promise. When users take our thermal imaging scopes through rainstorms, across streams, or into damp forests for hours, they need absolute confidence that precision electric board inside remain untouched by moisture, and that critical electronic components won’t fail due to dust. That confidence cannot come from us alone—it must come from an objective, just and authoritative third party.

Reliability is not an ideal laboratory data point; it’s the real-world experience of users in combat zones, hunting fields, and combat scenes. Every NPO device not only passes multiple internal inspections but also carries an IP68 certification from an independent third party. This is our written commitment to customers and our redefinition of “Made in China” quality.

From oxidation protection for infrared detectors, to optical stability at -40°C, to today’s third-party IP68 certification—in places visible and invisible, NPO constantly asks the same question: How can we give users absolute confidence in our products under extreme conditions? The answer lies in these seemingly “excessive” commitments.

Modern hunting sights have fully entered the electronic age. From thermal scopes to red dot sights, the precision electrical components are packed into compact housings. The stability of these components directly determines the accuracy and reliability of your optic.

Unlike traditional optical sights, electronic aiming systems rely on circuit boards, sensors, and processing chips—components rich in metals like copper and tin. These semiconductor materials are not inert like glass; they are constantly under attack from oxygen and moisture in the air. Component oxidation is the silent killer that accelerates performance degradation and shortens the lifespan of modern thermal imaging scopes and red dot sights.

From my first day in this industry four years ago, one of my most critical missions has been fighting an invisible enemy: humidity and air. Protecting precision electric boards, sensors, and processing chips—slowing their oxidation—is essential to ensuring every NPO product performs reliably in demanding hunting environments.

At Novelty Point Optics, we’ve developed a comprehensive system to combat electronic oxidation. Our most powerful weapon is the vacuum nitrogen filling machine, which is an “Inert Shield” for Your Optics.

This process is the final step before every NPO product leaves our facility—and it’s perhaps the most telling example of our commitment to quality. Here’s how it works:

Preparation: The small vent screw on the product’s base is opened.

Vacuum & Drying: Units are inverted and placed in the vacuum chamber tray. The door seals, and the vacuum cycle begins, extracting all air from the chamber and from inside every optic. Simultaneously, the chamber automatically heats to 65°C/145°F, drying each unit and removing all residual moisture.

Nitrogen Infusion: Once target vacuum pressure, temperature, and time are reached, the system opens a solenoid valve, flooding the chamber and every optic with high-purity nitrogen.

Permanent Sealing: The chamber opens. Because pure nitrogen is heavier than air, it remains inside the inverted optics. We quickly seal the vent hole with a special srew and apply silicone for secondary protection, locking the nitrogen inside permanently.

This process creates an inert gas environment for the precision electric components inside every NPO thermal riflescope and red dot sight. Deprived of oxygen and moisture, oxidation is dramatically slowed, extending product lifespan and enhancing resistance to harsh environments.

Behind the high performance you see is Novelty Point Optics’ unwavering commitment to our customers—a humble pursuing of product quality achieved through complex, rigorous processes. Vacuum nitrogen filling is just one of our “invisible efforts,” but it protects something vital: your absolute confidence with every trigger pull in the dark.

At the heart of every NPO thermal riflescope lies an uncooled VOx (Vanadium Oxide) infrared detector. While this material delivers exceptional thermal sensitivity, it also presents a formidable challenge in the world’s coldest hunting grounds—North America, Northern Europe, and Russia—where winter temperatures can plunge to -40°C. When the mercury drops this low, the detector undergoes significant physical changes:

Responsivity declining: The sensor’s sensitivity to infrared signals diminishes.

Signal-to-Noise Shift: The balance between useful signal and background noise becomes distorted.

Non-uniformity increasing: Fixed pattern noise emerges, degrading image quality.

Without active compensation, these effects would render thermal imaging useless—overall brightness and contrast would be severely compromised, directly impacting aiming accuracy when it matters most. Our solution for the latest generation rifle thermal scopes are Embedded Temperature Sensors & Adaptive Correction Algorithms. A precision temperature sensor continuously monitors internal conditions. The system dynamically calls upon optimized calibration tables or performs real-time background calibration to compensate for detector and optical drift. The result: stable, clear imagery regardless of ambient temperature.

But the detector isn’t the only component affected by extreme cold. Every optical element and structural component undergoes physical deformation due to thermal expansion and contraction—changes that threaten optical precision. Novelty Point Optics addresses this through deliberate, preemptive design:

Reinforced Structures: Critical stress points are reinforced and ribbed.

Potting Fixation: Key components are secured with industrial adhesives to prevent warpage.

Material Selection: Cold-optimized material combinations are chosen from the start.

These measures significantly minimize boresight shift in extreme temperatures, ensuring that when you aim, you hit.

Every NPO thermal scope must survive one ultimate challenge before leaving our facility. As shown below, we power on each fully assembled unit, place it in a professional thermal chamber, and lower the temperature to -40°C. Inside this frozen environment, we rigorously test optical boresight retention.

Any unit that fails this test is immediately disassembled, inspected, and reassembled until it meets our exacting standards. This isn’t just quality control—it’s a promise to every user who trusts NPO in the field.

From the -40°C wilderness to the precision of your next shot, NPO technology stands with you in the dark.

In 2025, our predecessor Infra-optics executed a major overhaul of the FMR-series thermal scopes. The most significant change was a material revolution: replacing the series’ primary structural material from 6-series aluminum alloy to magnesium alloy.

The result was immediately impressive: the scopes’ weight dropped from 850 grams to 700 grams—a successful 18% reduction. The entire team celebrated this leap in lightweight performance.

However, real-world field conditions are the ultimate test. Starting around August 2025, we received a series of warranty claims, primarily from the Canadian market, concerning the newly upgraded FMR335L and FMR645L models. The issue was specific: broken battery door latches and mounting lugs.

An urgent investigation was launched. Engineering analysis pinpointed a critical oversight: when we switched from aluminum to magnesium, we retained the original latch design. Magnesium is lighter, but it also has significantly lower stiffness and fatigue strength than aluminum. The original design couldn’t compensate for this change in material properties, turning the latch into a stress-concentration point under repeated use and recoil.

We acted swiftly, supplying reinforced replacement latch components to our global network. But the true value of this episode was the profound lesson it taught us:

1. Material substitution is not a direct swap. Magnesium is about 35% lighter than aluminum, but its structural strength is lower. Weight reduction is its primary advantage, not increased durability.
2. Application requires a “strength-first” rule. NP-Optics now reserves magnesium alloy primarily for products like handheld thermal monoculars, where extreme lightweight is critical and absolute peak strength is less paramount.
3. Design must be tailored to the new material. For high-performance lines where magnesium is essential—like the new Rhino series thermal scopes—we have completely re-engineered critical stress points like the battery door latch and lugs. We’ve incorporated reinforced geometry and optimized load paths to ensure durability meets or exceeds that of our past designs.

Every technological step forward brings new understanding. From the FMR to the Rhino series, what we learned from our “lightweighting success” was something even more valuable: a deepened respect for unwavering reliability. It’s a lesson built into every product we deliver.

At NP-Optics, our commitment is to build high-performance, supremely reliable thermal imaging scopes. For any aiming system, absolute precision is non-negotiable. In the world of daytime optics, the optical collimator is the universal tool for ensuring this. Yet, a fundamental barrier exists for thermal scopes: infrared light cannot pass through a standard collimator’s objective lens, rendering this essential QA process useless.

Confronting this industry-wide challenge head-on, NP-Optics embarked on an in-house R&D mission. The result is our proprietary Multispectral Boresight Collimator. This advanced instrument can simultaneously process infrared, visible, and laser wavelengths, allowing it to precisely measure the alignment—or misalignment—between the thermal sensor core, the display reticle, and the objective lens.

How This Calibration System Defines Our Manufacturing:

1. Assembly-Level Alignment: After initial assembly of the core, eyepiece, lens, and OLED display, the unit is placed in the collimator. Components are then minutely adjusted and secured, establishing a foundation of perfect alignment before final assembly.
2. Final Inspection Verification: Post-assembly, every scope must return to the collimator for final QA. We enforce a stringent 15-pixel tolerance standard, ensuring the reticle center deviates from the true optical axis by no more than this limit.
3. Reliability Re-verification: Qualified units then undergo a brutal shock test: 1000 cycles at 2Hz with 700G acceleration. After this simulation of extreme recoil and impact, the scope is tested a third time. It passes only if its boresight remains steadfastly within the 15-pixel tolerance.

Extended Precision: This system also calibrates integrated laser rangefinders, ensuring the laser dot coincides exactly with the on-screen aiming point, creating a unified “range-and-aim” system.

Every NP-Optics optical device passes through this multispectral calibration gauntlet. We believe exceptional thermal image quality is the starting point. Absolute aiming reliability, built on millimeter and pixel-level precision, is the ultimate promise of a professional tool. This is the accuracy we build into every scope.

In 2023, a deep collaboration with professional users in Eastern Europe taught us a pivotal lesson in practical design. They were using our first-generation FMR335 thermal imaging scope and came back with a specific, hardware-focused request: “We need a Picatinny rail on top.”

Initially, we wondered why. The answer revealed a critical need for tactical flexibility. In high-intensity use, constantly swapping between a daytime optic and a thermal scope is inefficient and can compromise zero. These users needed a permanent, unified weapon platform that could adapt in an instant.

Their logic was brilliant in its simplicity:

• Mount a red dot sight on the newly added top Picatinny rail.
• Leave the thermal scope on the main rail underneath.
• Daylight/CQB: Use the always-ready, zero-power red dot for speed.
• Darkness/Concealment: Flip on the thermal scope for imaging.

This configuration eliminates the “dead scope” dilemma. Imagine a coyote appears at 40 yards in broad daylight. Your rifle is equipped with this hybrid system. You raise it and the red dot is instantly live—no waiting for a thermal scope to boot. You take the shot. The top-mounted Picatinny rail just turned a specialized night-vision tool into a 24/7 ready rifle.

That user request directly shaped our product line. We now design key models with an integrated top Picatinny rail, recognizing it’s not just an accessory point but the cornerstone of a dual-purpose sighting system. It’s a testament to building what users truly need, not just what we think they want.

Explore NP-Optics thermal scopes built with user-inspired features, designed for all hunting situation adaptability.