What is RGB ACHROMATIC COLLIMATOR

What is the UltraOpto RGB ACHROMATIC COLLIMATOR (RGB Achromatic Collimator)?

Technical Description

The UltraOpto RGB ACHROMATIC COLLIMATOR is a high-precision optical device specifically designed for the red (R), green (G), and blue (B) visible light bands. Its core function is to convert divergent RGB mixed light beams into parallel light and eliminate chromatic aberration deviations among different wavelength bands.

This device is made of low-dispersion optical glass and a micro-layered lens structure. It is manufactured through substrate selection, precise layering, integrated grinding and polishing, and full-process inspection. Through a special optical design, it compensates for the refractive index differences of the RGB three-color lights, ensuring that the three-color lights are collimated in the same direction without imaging offset or color blurring issues.

Core Features

Achromatic Precision: The chromatic aberration accuracy for the RGB three bands is ≤0.01°, and the beam parallelism deviation is <0.005rad, meeting the requirements of high-definition imaging and color laser applications.

Miniaturization and High Stability: Compact in size (diameter can be customized from 5 to 20mm), with a compact structure and strong environmental tolerance, maintaining performance without degradation in temperature and humidity fluctuating environments.

High Transmittance: The optical surface is coated with a special anti-reflection film, with an average transmittance of ≥99.2% in the RGB bands, reducing light loss.

Typical Application Areas

High-Definition Projection Equipment: Optimizes the coupling efficiency of the three-color lights, enhancing the color uniformity and clarity of the projected image.

Color Laser Systems: Used in laser display and laser processing equipment to achieve precise parallel light output.

Machine Vision Inspection: 

Compatible with color imaging modules, eliminating chromatic aberration interference and improving inspection accuracy.

The UltraOpto RGB Achromatic Collimator can be customized according to customer requirements for interface specifications and optical parameters. The entire production process is controlled with high-precision inspection equipment, providing stable and reliable core component support for high-end color optical systems.

Core Definition of RGB Achromatic Collimator

The RGB achromatic collimator is a high-precision optical device specially designed for red (R), green (G) and blue (B) primary color lights. It can synchronously achieve color-free drift, no caustics and confocal collimation in a wide wavelength band, and solves the problems of spot offset, chromatic dispersion and inconsistent focusing caused by multi-wavelength chromatic aberration at one time. It is widely used in RGB laser display, projection, optical communication, color imaging and machine vision systems.

Chromatic Aberration Problem and Product Solution Principle

Ordinary collimators have different focal lengths at different wavelengths. When RGB lights share the same optical path, spot separation, edge chromatic dispersion and focusing misalignment will occur. The RGB achromatic collimator adopts apochromatic structure, aspherical combination and chromatic dispersion compensation design, which makes the focal lengths of R/G/B three wavebands highly consistent, and realizes coaxial, confocal and same-spot output of three-color light beams.

Core Optical Performance and Advantages

Wide wavelength band coverage: typically 450–650nm, compatible with common red, green and blue laser wavelengths

Achromatic ability: three-color focal spot offset < 5μm, high coaxiality of collimated beam, no chromatic dispersion

Low loss and high transmittance: anti-reflection coating design, transmittance ≥ 99%, IL ≤ 0.2dB

Good beam quality: divergence angle ≤ 0.1mrad, uniform spot without distortion

Stable structure: small temperature drift, suitable for long-term continuous operation

Product Structure and Key Components

It consists of achromatic lens group, precision sleeve, optical fiber interface and stable packaging. The lens group adopts multi-piece glass combination + aspherical correction to eliminate spherical aberration, chromatic aberration and coma aberration. The shell is made of low-expansion alloy to ensure that the optical precision does not shift under temperature-varying environment.

Typical Application Scenarios

RGB laser projection, stage lighting, outdoor laser display

Color lidar, 3D sensing, RGB imaging systems

Multi-wavelength optical fiber communication, wavelength division multiplexing modules

Machine vision, color detection, biomedical imaging

Multi-wavelength coaxial collimation and beam combining systems for scientific research experiments

Core Differences from Ordinary Collimators

Ordinary collimators are only optimal at a single wavelength, and chromatic dispersion and focal separation will occur when used for RGB lights. The RGB achromatic collimator is optimal for three colors at the same time. After collimation, the spots overlap without color edges and do not separate during long-distance transmission, making it an essential device for color optical systems.

Key Parameter Points for Selection

Selection should focus on: operating wavelength band, collimation focal length, spot diameter, divergence angle, interface type (FC/APC/SMA), adjustable range, power level; ensure matching with the specific R/G/B wavelengths and optical path structure of the system.

Summary of Product Features and Value

With the characteristics of three-color confocal, low chromatic aberration, high stability and easy integration, the RGB achromatic collimator replaces the complex debugging of multiple groups of collimators, simplifies the system structure and improves the display/imaging quality. It is an ideal collimation solution for multi-wavelength color optical systems.