Views: 0 Author: Site Editor Publish Time: 2026-05-11 Origin: Site
Introduction
In endoscopy, smaller is often better. A miniature endoscope camera module must fit through narrow passages – blood vessels, tear ducts, or tiny industrial borescope holes. The sensor, the heart of the camera module sensor, largely determines the tip diameter. Choosing the right sensor size balances image quality against physical size. This article explains typical sensor sizes for different endoscope camera module designs, from ultra‑thin medical scopes to flexible industrial tools.
What Is Sensor Size and Why Does It Matter?
Sensor size is the diagonal of the imaging area (e.g., 1/9″, 1/6″, 1/4″). A smaller sensor allows a smaller lens and housing, making the whole miniature endoscope camera module extremely thin. But smaller sensors have smaller pixels, capturing less light and producing more noise. Larger sensors (1/3″) give better low‑light performance and higher resolution but make the tip thicker.
Common Sensor Sizes for Miniature Endoscope Cameras
Sensor Size | Typical Resolution | Tip Diameter | Common Uses |
|---|---|---|---|
1/9″ (~2.8 mm) | 400×400 – 640×480 | 1.5–2.5 mm | Medical micro‑endoscopy, neurology |
1/6″ (~3.0 mm) | 640×480 – 1280×720 | 2.5–4.0 mm | Veterinary, flexible ureteroscopy |
1/4″ (~4.5 mm) | 1280×720 – 1920×1080 | 4.0–6.0 mm | Standard medical, industrial borescopes |
1/3″ (~6.0 mm) | 1920×1080 – 4K | 6.0–10 mm | Professional HD medical and industrial |
Miniature Endoscope Camera Module – 1/9″ to 1/6″
The smallest miniature endoscope camera module often uses a 1/9″ or 1/6″ camera module sensor. Pixel pitches are around 1.4–2.0 µm. Image resolution is typically VGA (640×480) or 720p. For example, the OmniVision OV6948 (lens and sensor integrated) measures just 0.65 mm × 0.65 mm – ideal for disposable medical micro‑endoscopes. A flexible endoscope camera module with a 1/6″ sensor can navigate tight urology passages or small engine cylinders.
HD Endoscope Camera Module – 1/4″ to 1/3″
For higher detail, a hd endoscope camera module (720p or 1080p) typically uses a 1/4″ to 1/3″ sensor. The larger area allows more pixels (2 MP) and better light sensitivity. A cmos endoscope camera module with a 1/3″ Sony IMX290 delivers excellent low‑light performance for medical laparoscopy or turbine inspection, while keeping the tip under 6 mm.
USB Camera Module for Endoscopy
Many consumer and professional USB endoscopes use a USB Camera Module with a 1/4″ or 1/3″ sensor. USB makes them plug‑and‑play, and the larger sensor gives good image quality for general tasks. A typical USB Camera Module with a 1080p sensor (1/4″) has a tip diameter of 5.5–7 mm – small enough for most plumbing and automotive borescopes.
CMOS Endoscope Camera Module – Technology Behind Small Sensors
All modern miniature endoscopes use a cmos endoscope camera module (CMOS) instead of CCD. CMOS integrates readout and amplification on the chip, allowing extremely small die sizes. Back‑illuminated (BSI) CMOS further improves low‑light sensitivity even on tiny 1/9″ sensors. For a flexible endoscope camera module, the sensor is often mounted on a flexible PCB to withstand repeated bending.
Trade‑Offs: Small Sensor vs. Image Quality
Priority | Choose 1/9″ – 1/6″ | Choose 1/4″ – 1/3″ |
|---|---|---|
Minimum tip diameter | Yes | No |
Resolution | VGA – 720p | 1080p – 4K |
Low‑light performance | Poor | Good |
Depth of field | Very large | Large |
Cost | Lower | Higher |
Practical Examples
Medical micro‑endoscopy (1.2 mm tip) – Uses a 1/9″ sensor, VGA, fixed focus. The miniature endoscope camera module is often disposable.
Flexible industrial borescope (4 mm tip) – Uses a 1/4″ 1080p cmos endoscope camera module. A flexible endoscope camera module snakes through pipes while delivering clear images.
USB endoscope for mechanics (5.5 mm tip) – Uses a USB Camera Module with a 1/3″ 1080p sensor, LED ring, and fixed focus.
Sincere’s Miniature Endoscope Camera Modules
At Sincere, we design endoscope camera module products with sensor sizes from 1/9″ to 1/3″:
Miniature endoscope camera module – 1/9″ and 1/6″ for ultra‑thin scopes.
HD endoscope camera module – 1/4″ and 1/3″ for 720p/1080p.
USB Camera Module – Plug‑and‑play endoscopes with 1/4″ or 1/3″ sensors.
Cmos endoscope camera module – BSI technology for better sensitivity.
Flexible endoscope camera module – Sensors on flex PCB for bending.
Camera module sensor – Custom selection to match diameter and resolution.
Summary
Sensor size in a miniature endoscope camera module is a critical choice. For the smallest tip (1.5–3 mm), a 1/9″ or 1/6″ sensor delivers VGA to 720p – enough for micro‑surgery or precision inspection. For better image quality (1080p), a 1/4″ or 1/3″ sensor gives a 4–7 mm tip diameter. A cmos endoscope camera module with BSI technology improves low‑light performance even on small sensors. Whether you need a USB Camera Module for a consumer borescope or a flexible endoscope camera module for industry, understanding sensor size helps you balance diameter and image quality.
