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In cutting-edge fields such as minimally invasive medical exploration, precision micro-component inspection, and micro-instrument embedded imaging, imaging system selection faces extreme physical constraints: probe diameter must be under 3mm, working distance only a few centimeters, environment may contact liquids, yet images must be sharp enough to identify tiny defects. When conventional endoscopes cannot enter micro-catheters or micro-holes due to size, a USB endoscope module featuring 2.8mm Diameter, IP67 waterproof, steel shell, Separate Endoscope design, and 105° ultra-wide angle becomes a professional solution worth evaluating. This article provides a clear selection framework from six dimensions—physical size, environmental protection, optical performance, interface protocol, separate structure, and illumination options—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 with a Steel shell stainless steel housing, representing an extreme miniaturization design within Separate Endoscope. 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 steel shell provides crush and scratch resistance even at 2.8mm diameter, significantly enhancing probe durability in complex environments.
Compared to conventional endoscopes above 3mm, the 2.8mm extends the detectable range downward by 0.2mm—a seemingly small difference that determines whether a standard 1/8-inch (≈3.175mm) medical catheter or industrial capillary can be accessed.
As an ultra-micro representative of endoscope camera module, 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 flexible cable’s bending radius. The separate design makes the front end extremely light, facilitating navigation through tortuous paths.
Second step: Assess risks of liquid contact, disinfection, and mechanical impact in the inspection environment.
This module has IP67 Waterproof rating and a Steel shell, making it fully dust-tight and able to withstand immersion in 1 meter of water for 30 minutes. The engineering value:
Suitable for medical endoscope disinfection wipe-down, residual coolant in industrial pipes, rainwater splashes in outdoor inspections, and similar scenarios.
The steel shell also provides drop and crush protection, ideal for frequent mobile field inspections.
IP67 rating ensures stable operation in humid or temporary immersion conditions without additional protective sheaths.
Note: IP67 is not suitable for high-temperature liquids (>50°C) or high-pressure water jets; for autoclave sterilization in medical applications, confirm the tolerances of the steel shell and sealing materials. This module has passed relevant reliability tests and meets routine disinfection requirements.
Third step: Confirm working distance, field coverage, and detail resolution requirements.
This module uses a 300K-pixel sensor (240×320@30fps), featuring a 105° ultra-wide angle (characteristic of a Wide Angle camera module) and a 3–50mm dedicated macro focus range. 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 spans from ultra-close (3mm) to moderate distance (50mm), covering typical micro-inspection distances without frequent focusing.
300K resolution is sufficient to resolve 0.05mm-level micro-scratches, foreign objects, or solder joint morphology in macro scenarios, with low data volume and stable transmission.
As a macro-optimized version of usb2.0 endoscope camera, this module prioritizes “good enough and lightweight” over high megapixels. When selecting, assess: If 0.01mm-level defects need identification, consider higher resolution; but for routine tasks like inspecting micro-catheter inner walls or chip solder joint bridging, 240×320 is adequate.
Fourth step: Confirm host platform type and driver development capability.
This module uses a USB 2.0 interface, strictly follows the UVC driver-free protocol, and supports YUV/MJPEG dual output formats, making it a standard UVC Camera Module. The core value:
No driver development required; automatically recognized as a camera device by Windows, Linux, Android, macOS, etc.
Dual-format output allows switching to MJPEG (high compression) when bandwidth is limited, or YUV (lossless) when raw quality is needed.
The separate DSP board connects to the front end via soldered wires, and the back end outputs standard USB signals, simplifying system integration.
As a typical usb2.0 endoscope camera, verify that the target host supports UVC (most modern devices do), and evaluate the DSP board’s size and mounting location (typically embedded within the host device).
Fifth step: Evaluate internal space layout and dark-environment fill light needs.
This module adopts a Separate Endoscope design: the optical front end (only lens and sensor) is separated from the DSP board, connected by soldered wires. The engineering value:
The front end is extremely small and light (only 2.8mm diameter), reaching narrow areas, while the DSP board can be placed away from the detection end, facilitating integration into the host.
Optional 4×0201 white LEDs, with independent power supply and SPI control, enable brightness adjustment for completely dark micro-cavities.
The illumination option does not increase the front end diameter because LEDs are placed at the DSP board or via flying wires, preserving the probe’s extreme miniaturization.
When selecting, confirm: Is LED fill light needed? For completely dark environments (e.g., inside micro-holes), LEDs are mandatory; if ambient light exists, they can be omitted to reduce cost. SPI control pins allow software brightness adjustment to avoid overexposure on highly reflective materials.
Application Scenario | Recommended Configuration | Selection Rationale |
|---|---|---|
Medical micro-catheter inner wall inspection | 2.8mm probe + IP67 steel shell + LED | 2.8mm Diameter fits ≥3.0mm catheters; IP67 Waterproof handles 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 |
Minimally invasive surgical assistance imaging | Disposable sheath + dimmable LED | Separate Endoscope front end lightweight; UVC direct to monitor for low-latency real-time guidance |
Micro-pipeline robot vision | Steel shell protection + long cable | 2.8mm passes through ultra-narrow channels; Steel shell resists abrasion; 30fps supports dynamic navigation |
Jewelry/artifact micro-area observation | Fixed stand + external light source | 105° wide angle reduces movement; 3–50mm flexible focus; USB direct to computer for recording |
The core value of the 2.8mm IP67 waterproof separate 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, and the industrial protection of IP67 Waterproof and Steel shell—providing unprecedented accessibility and practical image quality for micro-channel, minimally invasive medical, and micro-component 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).
Will it contact liquids? For liquid exposure or wipe-down disinfection, IP67 Waterproof and Steel shell are mandatory; dry environments may allow non-waterproof versions to reduce cost.
Is illumination needed? Completely dark environments require the optional 4×0201 LEDs; 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, and DSP board interfaces according to your micro-inspection scenario. We recommend obtaining engineering samples before mass production and conducting accessibility, image clarity, and waterproofing tests in real micro-catheters or micro-holes to ensure your selection is both scientifically sound and forward-looking.
