Views: 0 Author: Site Editor Publish Time: 2026-04-23 Origin: Site
In long-distance industrial pipeline inspection, narrow dark-field detection, and lightweight embedded device integration, imaging system selection often faces three challenges: the probe must reach cavities deeper than 2.5 meters, the cable must be thin yet maintain signal integrity, and illumination must cover dark areas without increasing probe diameter. When the inspection task demands “far, thin, and dark,” a separate USB endoscope module based on the OCHFA20 sensor—featuring 0.5MP resolution, 120° ultra-wide angle, a 2.5-meter long coaxial cable, and flying light LED design—becomes a professional solution worth evaluating. This article provides a clear selection framework from five dimensions—separate long-cable structure, ultra-wide angle optics, flying light illumination, interface and power, and typical applications—while incorporating key terms such as endoscope camera module, Wide Angle camera module, usb2.0 endoscope camera, UVC Camera Module, OCHFA20, and Separate Endoscope to help you precisely match long-distance narrow cavity inspection needs.
First step: Assess inspection depth, channel diameter, and cable routing path.
This module adopts a Separate Endoscope design, with the optical front end separated from the rear DSP board, connected by a 2.5-meter (2500±20mm) coaxial cable of only 0.55mm diameter. The engineering value lies in:
The 2.5m length reaches deep into most industrial pipes, building ventilation ducts, equipment cavities, and long wiring channels, covering applications from engine cylinders to building walls.
The 0.55mm ultra-thin cable passes through extremely narrow gaps or pre-installed conduits with almost no added bulk, ideal for retrofitting into existing equipment.
The separate structure places the heavier DSP board remotely, leaving only a miniature lens and sensor at the front end, significantly reducing the weight and size of the insertion part for easier handheld operation.
As a long-distance specialized endoscope camera module, this product resolves the conflict between “reaching in” and “getting signal out.” When selecting, confirm: Does the 2.5m length meet your actual inspection depth (longer custom lengths possible, but evaluate signal attenuation)? Does the 0.55mm cable’s bend radius suit on-site angles? The DSP board must be placed outside the detection area, so ensure adequate mounting space.
Second step: Confirm typical working distance, field coverage, and detail resolution requirements.
This module incorporates the OCHFA20 CMOS sensor (1/18-inch), outputting 720×720 resolution with a 120° ultra-wide angle (characteristic of a Wide Angle camera module). The core value lies in:
The 120° ultra-wide angle greatly reduces blind spots in narrow cavities, covering a wider area in a single frame, especially suitable for circumferential scanning of pipe walls or panoramic observation of deep cavity bottoms.
720×720 resolution at 0.5MP, though less detailed than 1080P, is sufficient for qualitative judgments (presence of foreign objects, blockages, obvious cracks) and offers smaller data volume for stable transmission.
Fixed-focus design simplifies operation, and auto white balance maintains color consistency under varying lighting conditions.
As a lightweight version of usb2.0 endoscope camera, this module prioritizes “good enough, reliable, easy to deploy” over extreme pixel count. When selecting, assess: If micron-level defects (e.g., cracks below 0.1mm) need identification, consider higher resolution options; but for long-distance pipe inspection and dark-field foreign object detection, 0.5MP with 120° wide angle provides adequate information.
Third step: Evaluate the darkness of the target environment and fill light requirements.
This module uses a unique “flying light” design—LEDs are extended from the lens via wires rather than integrated into the probe tip. The engineering value:
The probe front end requires no space for LEDs, allowing the diameter to be minimized (only lens + sensor), ideal for passing through extremely narrow channels.
Fill lights can be flexibly placed according to the detection scenario (e.g., fixed at the pipe entrance or handheld), avoiding glare or shadows caused by probe-mounted illumination.
Effectively solves the illumination challenge in long, dark cavities, especially where external lighting is needed and the probe itself cannot carry high-power LEDs.
When selecting, note: The flying light design means LEDs are separate from the lens, requiring additional wiring; for completely dark 2.5m deep cavities, choose high-brightness LEDs and confirm power supply capability. The module supports 3.3V AVDD low-power operation, extending battery life.
Fourth step: Confirm host platform type and system integration path.
This module must be used with a DSP board, which outputs UVC-compliant image signals, making it a standard UVC Camera Module. The core value lies in:
The DSP board converts front-end analog/digital signals to USB2.0 UVC format, allowing direct recognition by computers, phones, or embedded boards—no driver development needed.
The separate design allows the DSP board to be placed away from harsh environments (high temperature, humidity, vibration), improving overall reliability.
3.3V low-power supply suits battery-powered portable devices and reduces heat dissipation.
As a modular usb2.0 endoscope camera, when selecting, confirm: The DSP board’s dimensions and mounting location; the cable connector type (typically coaxial); whether an SDK or configuration tool is provided (if white balance, exposure adjustments are needed). The module has built-in auto white balance, requiring no manual intervention in most scenarios.
Application Scenario | Recommended Configuration | Selection Rationale |
|---|---|---|
2.5m deep industrial pipe inner wall inspection | 2.5m long cable + external LED | Separate Endoscope reaches deep; 120° wide angle covers circumference; flying light avoids probe jamming |
Building ventilation duct foreign object detection | Thin cable + handheld DSP board | 0.55mm cable passes through small access ports; 720×720 sufficient to identify blockages |
Lightweight embedded inspection device | DSP board integrated into main controller | Low power, small size; OCHFA20 sensor meets basic vision acquisition |
Automotive engine long oil channel inspection | Oil-resistant cable + flexible LED | 2.5m reaches deep into oil channel; flying light illuminates externally, avoiding heat damage to probe |
Low-cost industrial visual monitoring | Fixed mount + USB direct to PC | UVC plug-and-play; 120° wide angle reduces number of cameras |
The core value of the OCHFA20 0.5MP wide-angle separate USB endoscope module lies in combining the long-distance reach of a Separate Endoscope, the wide coverage of a Wide Angle camera module, the plug-and-play convenience of a UVC Camera Module, and the flexibility of flying light illumination—providing a cost-effective vision tool for long-distance narrow cavities, dark-field detection, and lightweight embedded inspection. When selecting, prioritize three questions:
How far must you go? The 2.5m standard length covers most deep cavities; longer custom lengths are possible but evaluate signal attenuation.
How narrow is the space? The 0.55mm cable diameter passes through tiny gaps; the front end is only the lens size (estimated <3mm), suitable for ultra-narrow channels.
How to illuminate? Flying light allows external fill light, avoiding probe bulk; in complete darkness, configure sufficiently bright LEDs.
As a manufacturer with over 30 years of optical imaging experience, SincereFirst not only supplies standard endoscope camera module products but also customizes cable length, LED specifications, and DSP board interfaces according to your inspection scenario. We recommend obtaining engineering samples before mass production and conducting accessibility, image clarity, and illumination tests in real 2.5m deep cavities or narrow gaps to ensure your selection is both scientifically sound and forward-looking.
