Views: 0 Author: Site Editor Publish Time: 2026-04-27 Origin: Site
In minimally invasive medical exploration, precision micro-component inspection, micro-pipeline inspection, and portable detection instrument development, imaging system selection often faces extreme constraints: probe diameter under 3mm, working distance only a few centimeters, possible liquid contact, yet images must be sharp enough to identify minute defects. When conventional endoscopes cannot enter micro-catheters or micro-holes due to size, a USB endoscope module featuring 2.8mm Diameter, steel shell reinforcement (Steel shell), separate design (Separate Endoscope), 105° ultra-wide angle, and 3–50mm dedicated macro optics becomes a professional solution worth evaluating. This article provides a clear selection framework from six dimensions—physical size, structural protection, optical performance, interface protocol, illumination configuration, and typical applications—while incorporating key terms such as endoscope camera module, Wide Angle camera module, usb2.0 endoscope camera, UVC Camera Module, 2.8mm Diameter, Separate Endoscope, IP67 Waterproof, and Steel shell to help you precisely match micro-space precision inspection needs.
First step: Precisely measure the minimum inner diameter and bend radius of the target channel.
The probe diameter is 2.8±0.05mm, featuring a Separate Endoscope design where only the lens and sensor are at the front end, connected to the rear DSP board via soldered wires. The engineering significance:
Easily accesses micro-catheters, micro-holes, precision instrument gaps, and natural body cavities with inner diameter ≥3.0mm, covering most ultra-narrow spaces in medical, electronics, and micromachinery fields.
The separate structure makes the front end extremely small and light, facilitating navigation through tortuous paths, while the rear DSP board can be placed away from the detection area, improving system integration flexibility.
As an ultra-micro representative of endoscope camera module, the 2.8mm diameter extends the detectable range into the microscopic world unreachable by conventional probes.
When selecting, verify: Is the channel inner diameter ≥3.0mm? For sharp 90° bends, evaluate the probe’s rigid section length (typically 5–8mm) and the bending radius of the flexible soldered wires. The module uses soldered connections with extremely fine wires, adapting to complex routing.
Second step: Assess mechanical impact, liquid contact, and reliability requirements.
The module uses a Steel shell round steel sleeve to reinforce the probe, significantly improving crush, bend, and scratch resistance. Although the base version does not specify a waterproof rating, based on the steel shell structure and mature sealing processes, it can be customized to achieve IP67 Waterproof—fully dust-tight and capable of withstanding immersion in 1 meter of water for 30 minutes. The engineering value:
Steel shell reinforcement allows the probe to withstand accidental drops, crushing, and repeated insertions in field inspections, extending service life.
Optional IP67 Waterproof versions suit medical disinfection wipe-down, residual coolant in industrial pipes, rainwater splash outdoors, and other wet or liquid-contact scenarios.
The protection does not increase the probe diameter (still 2.8mm), maintaining extreme miniaturization while ensuring reliability.
Note: If the application environment clearly involves liquids (e.g., endoscope disinfection, underwater inspection), the IP67 Waterproof customized version is mandatory; for dry scenarios, the standard steel shell version reduces cost. The steel shell surface can be treated for corrosion resistance to suit oil and chemicals.
Third step: Confirm working distance, field coverage, and detail resolution requirements.
The optical system features dedicated 3–50mm macro focus and a 105° ultra-wide angle (characteristic of a Wide Angle camera module), with 0.5mm focal length, F4.5 aperture, TV distortion < -10%, and 240×320@30fps resolution. The core value:
The 105° ultra-wide angle achieves extreme field expansion within a 2.8mm diameter; at 3mm working distance, it covers about 6.5mm width, capturing the entire cross-section of a micro-hole or a tiny solder joint in a single frame.
The 3–50mm focus range precisely covers typical macro inspection distances, maintaining clear images without frequent focusing, especially suitable for applications with limited probe maneuverability.
240×320 resolution is sufficient to resolve 0.05mm-level micro-scratches, foreign objects, or solder joint morphology, with very low data volume for stable transmission and low power consumption.
As a macro-optimized version of usb2.0 endoscope camera, this module prioritizes “good enough, lightweight, reliable” over high megapixels. When selecting, assess: If 0.01mm-level defects need identification, consider higher resolution; but for routine macro tasks like inspecting micro-catheter inner walls, chip solder joint bridging, or tiny gear burrs, the current configuration is fully adequate.
Fourth step: Confirm host platform type and driver development capability.
This module uses a Mini USB interface, incorporates the UVC Camera Module standard protocol, supports YUV/MJPEG dual output formats, and is plug-and-play without driver installation. The core value:
No driver development required; automatically recognized as a camera device by Windows, Linux, Android, macOS, etc., significantly shortening development cycles.
Dual-format output allows switching to MJPEG (high compression) when bandwidth is limited, or YUV (lossless) when raw quality is needed, flexibly adapting to different applications.
The separate DSP board connects to the front end via soldered wires, outputting standard USB signals directly, simplifying system integration.
As a standardized usb2.0 endoscope camera, verify that the target host supports UVC (most modern devices do), and evaluate the DSP board’s size and mounting space. For embedded systems, UVC drivers can be used directly for image capture.
Fifth step: Assess dark environment conditions and fill light requirements.
The module reserves pads for 4 white LEDs, with SPI control and independent LED power supply design, allowing optional LED installation for fill light. The engineering value:
Illumination options do not increase probe diameter (LEDs can be placed on the DSP board or via flying wires), preserving the 2.8mm extreme miniaturization.
Independent power supply and SPI control support brightness adjustment, adapting to highly reflective metal surfaces (reduce brightness) or dark, light-absorbing materials (increase brightness) as needed.
In completely dark micro-holes, pipes, or cavities, LED fill light is essential for clear imaging.
When selecting, confirm: Does the inspection environment have ambient light or external illumination? For complete darkness (e.g., inside deep holes), LED fill light is mandatory; if some ambient light exists, it can be omitted to reduce cost. The SPI interface allows dynamic brightness adjustment; reserve control pins if needed.
Application Scenario | Recommended Configuration | Selection Rationale |
|---|---|---|
Medical micro-catheter inner wall inspection | 2.8mm probe + Steel shell + IP67 Waterproof + LED | 2.8mm diameter fits ≥3.0mm catheters; waterproof for disinfection; 105° wide angle covers circumference |
Precision chip bottom solder joint inspection | Bare probe + no LED (external ring light) | 3mm macro clearly reveals bridging and cold joints; Wide Angle covers multiple pads in one frame |
Micro-pipeline robot vision | Separate Endoscope + steel shell + long soldered wires | Separate structure lightweight; steel shell resists abrasion; 240×320@30fps supports dynamic navigation |
Jewelry/artifact micro-area observation | Fixed stand + external light source + standard USB | 105° wide angle reduces movement; 3–50mm flexible focus; UVC direct to computer for recording |
Portable handheld endoscope | DSP board embedded in host + dimmable LED | USB2.0 endoscope camera plug-and-play; low power suitable for battery operation |
The core value of the 2.8mm wide-angle separate USB endoscope module lies in combining the extreme miniaturization of a Separate Endoscope, the wide field of a Wide Angle camera module, the plug-and-play convenience of a UVC Camera Module, the rugged protection of a Steel shell, and optional IP67 Waterproof environmental adaptability—providing unprecedented accessibility and practical image quality for micro-hole, crevice, and deep cavity inspection. When selecting, prioritize three questions:
How narrow is the space? If the channel inner diameter ≥3.0mm, the 2.8mm Diameter probe fits; if smaller, custom even smaller diameters (feasibility depends on sensor size).
Is liquid contact or high reliability needed? For liquid exposure, vibration, or impact, choose Steel shell and IP67 Waterproof versions; for dry, clean environments, the basic steel shell version reduces cost.
Is fill light needed? For complete darkness, optional 4 LEDs are mandatory; with ambient light, they can be omitted.
As a manufacturer with over 30 years of optical imaging experience, SincereFirst not only supplies standard endoscope camera module products but also customizes probe length, LED brightness, waterproof rating, and DSP board interfaces according to your micro-inspection scenario. We recommend obtaining engineering samples before mass production and conducting accessibility, image clarity, and protection tests in real micro-catheters, micro-holes, or narrow gaps to ensure your selection is both scientifically sound and forward-looking.
