75mm Uncooled LWIR Camera Module: Specifications and Selection Guide

A 75mm uncooled LWIR camera module combines a long-focal-length thermal lens with an uncooled infrared imaging assembly to detect and display differences in thermal radiation, usually without active cooling. It can support applications that need a relatively narrow field of view or greater target detail at distance, but “75mm” alone does not define detection range, image quality, or compatibility. Buyers should evaluate the lens together with detector resolution and pixel pitch, spectral response, thermal sensitivity, frame rate, interface, and environmental requirements. In this guide, we explain how to compare those specifications and prepare a practical sourcing request for Hope-Wish.

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Key Takeaways

• A 75mm designation usually refers to lens focal length; it is not a complete measure of range or performance.
• Field of view depends on both focal length and detector dimensions, so request the module’s horizontal and vertical FOV.
• Compare thermal, optical, electrical, mechanical, and software specifications as a complete system.
• Confirm integration details and commercial terms with the supplier before finalizing a design or purchase order.

Who This Guide Is For

This guide is for OEMs, system integrators, security equipment manufacturers, and procurement teams evaluating a long-focus thermal imaging component. It is particularly relevant when an existing camera design needs to observe distant or relatively small targets, or when a new product requires a narrow viewing angle. The right module depends on the complete system, including installation distance, target size, operating conditions, and image-processing workflow. A 75mm lens may be unsuitable if the application needs a broad scene overview or close-range coverage.

Understanding a 75mm Uncooled LWIR Module

What “75mm” Means

In this product description, 75mm generally indicates the lens focal length. A longer focal length normally produces a narrower field of view than a shorter focal length used with the same detector format. It does not, by itself, establish how far the module can identify or measure a target. Those outcomes also depend on detector characteristics, target dimensions and contrast, atmospheric conditions, image processing, and the system’s performance requirements.

What “Uncooled LWIR” Means

Uncooled modules use a detector that operates without a cryogenic cooling system, which can simplify integration compared with cooled thermal imaging systems. LWIR refers to long-wave infrared; a commonly used thermal imaging band is 8–14 μm, but the exact response should be checked in the supplier’s datasheet. Uncooled does not mean that every module has the same sensitivity, startup behavior, image quality, or operating limits. Buyers should compare the specified detector and module performance rather than relying on the category name.

Specifications to Compare

Request a current datasheet for the exact configuration being quoted. Some specifications vary with detector choice, lens assembly, firmware, or interface, so do not assume that a general product description applies to every module. The table below identifies the main items to verify and why they matter.

Match the Module to the Application

A 75mm lens can be considered for fixed or pan-and-tilt systems where a narrower view is useful, including some perimeter observation, equipment monitoring, and long-distance thermal viewing designs. These are application categories, not guarantees of detection or recognition performance. Before selection, define the target’s approximate dimensions, the operating distance, the required viewing angle, and whether the system needs detection, classification, measurement, or recording. Share those requirements with the supplier so that the proposed configuration can be assessed against the real use case.

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Check Field of View Rather Than Focal Length Alone

Field of view is determined by the lens focal length and the active detector dimensions. For illustration only, if a detector has a 9.6mm-wide active area and is paired with a 75mm focal length, the horizontal field of view is approximately 7.3 degrees using the standard geometric relationship. This example is not a Hope-Wish product specification and should not be used to predict performance for a different detector. Ask for the FOV values for the exact lens and detector combination under consideration.

A Practical Selection Framework

1. Define the viewing task. Record target size, distance, movement, scene coverage, and the level of detail your system must provide.
2. Confirm optical fit. Compare the quoted FOV with the scene and installation geometry; evaluate focus and any required protective window or housing.
3. Set detector and image requirements. Specify the desired resolution, sensitivity criteria, frame rate, output format, and image-processing needs.
4. Validate integration. Provide host-system interface, power, mechanical envelope, connector, control, and software requirements.
5. Review conditions and evidence. Ask for stated operating limits, specification definitions, and any configuration-specific test or inspection information available for review.
6. Request a sample or evaluation plan. Where practical, assess the module in representative conditions before approving production use.

Pricing, MOQ, and Lead Time

Pricing for a 75mm uncooled LWIR module depends on the selected detector, lens configuration, interface, firmware or customization requirements, and order quantity. Minimum order quantity and lead time are supplier- and configuration-dependent; they should be confirmed in a written quotation rather than assumed from a general product page. For a useful quote, send the target configuration, estimated quantity, destination market, required delivery window, and any sample or customization request. Also clarify whether the quotation covers accessories, documentation, packaging, and any agreed inspection steps.

Supplier Evaluation Checklist

Evaluate suppliers on the clarity and completeness of their technical response, not just the headline focal length or unit price. Ask whether the offered 75mm lens and detector combination is confirmed, and request the relevant datasheet and interface information. Confirm which specifications apply to the quoted configuration, how revisions are communicated, and what support is available during integration. Do not treat an unverified performance statement, certification, or delivery estimate as confirmed evidence.

Questions to Include in Your RFQ

• What are the detector resolution, pixel pitch, spectral response, and stated thermal sensitivity conditions?
• What are the horizontal and vertical FOV values for the 75mm configuration?
• Which video, control, and electrical interfaces are available, and what documentation is supplied?
• What are the operating limits, module dimensions, weight, power requirements, and focus options?
• What are the MOQ, sample availability, estimated lead time, customization scope, and warranty terms?

How Hope-Wish Can Support Your Evaluation

Hope-Wish supplies thermal imaging products for professional security and protection applications, including uncooled LWIR camera module solutions. For a 75mm requirement, our team can review your application parameters and discuss the available configuration, integration information, and quotation details. Availability and specifications should be confirmed for the exact model and order requirements. Providing a concise RFQ with your interface, FOV, environmental, and quantity needs helps make the technical and commercial review more efficient.

Conclusion: Choose by System Fit, Not by “75mm” Alone

A 75mm uncooled LWIR camera module is worth evaluating when the application calls for a narrow thermal view, but focal length alone cannot confirm suitability. Start with the target and viewing geometry, then verify FOV, detector performance, output, power, mechanical fit, and operating conditions against the supplier’s configuration-specific documentation. Before placing an order, clarify MOQ, lead time, customization, and evaluation options in writing. Contact Hope-Wish with your application and integration requirements to discuss an appropriate module configuration and request a tailored quotation.