A calibration chamber with a light source is a specialized device used for standardized calibration and performance verification of optical, lighting, imaging, and color measurement equipment. Its core function is to configure a standard light source within a relatively stable and controllable enclosed space. By controlling parameters such as light source type, color temperature, brightness, illuminance, and uniformity, it provides a repeatable standard testing environment for devices such as cameras, spectrometers, colorimeters, luminance meters, and illuminance meters.

1. Main Features

(1) Standard Light Source: Different light sources such as D65, D50, A, and TL84 can be configured according to requirements.

(2) Stable Light Source: Constant current drive and stable control are used to reduce errors caused by factors such as light source aging and temperature changes.

(3) Uniform Illuminance: The internal optical design of the chamber ensures relatively uniform illumination in the test area.

(4) Controllable Parameters: The brightness, color temperature, or operating mode of the light source can be adjusted.

(5) Light-Shielding Design: The enclosed structure reduces the influence of ambient stray light on the calibration results.

(6) Easy Calibration: It can be used with standard white boards, standard gray boards, and standard color cards to achieve instrument calibration, comparison, and repeatability testing.

2. Basic Principles

The calibration box integrates a high-density LED array and special optical diffusion materials. Through precise optical design, it achieves uniform illumination across the entire surface (uniformity ≥95%), eliminating interference from shadows, reflections, and ambient stray light. The calibration plate is fixed in a preset position inside the box and possesses known high-precision physical coordinate information. After the camera captures the image, corner points or center features can be extracted to establish a precise mapping relationship between the image pixel coordinate system and the world physical coordinate system. Through the closed box design, the calibration environment is completely controllable and unaffected by changes in external ambient light, ensuring high repeatability and stability of the calibration results.

3. Application Areas

The calibration box with light source is widely used in machine vision, color detection, LED/lighting detection, display screen detection, printing and packaging, industrial cameras, and optical instruments.

Dongguan Dafan Optical Technology Co., Ltd.(DFOPTIX) was founded in 2018, its headquarters located in Dongguan City, Guangdong Province, China. DFOPIX is a system-level calibration solutions service provider with engineering culture as its cornerstone and technological innovation as its core.

Currently, DFOPTIX has nearly 150 employees, with R&D personnel consistently accounting for over 30% of the workforce each year — a professional team combining deep engineering expertise with sustained innovation capability.

DFOPTIX has established an advanced R&D and manufacturing base spanning nearly 20,000 square meters, equipped with high-standard precision workshops such as class-100 lithography workshop and class-1000 vacuum lamination workshop, as well as various well-equipped professional laboratories. It has also introduced internationally advanced manufacturing and testing equipment, systematically establishing an industry-leading R&D and manufacturing system.

DFOPTIX specializes in the R&D and manufacturing of a full category of calibration products — including integrated light-source calibration targets and LiDAR calibration boards, while also providing customized calibration product services tailored to customers’ requirements. To date, our company's products and solutions have been widely deployed across sectors including medical, semiconductor, robotics, consumer electronics, intelligent vehicles, aerospace, 3D scanning, and industrial automation. DFOPTIX has served over 3,000 clients, including several Fortune 500 companies.