Do you know the machining accuracy requirements of optical instrument lenses?

The machining accuracy requirements of optical instrument lenses depend on the specific application requirements. In general, the accuracy of lens processing refers to the requirements of the surface quality, shape and optical properties of the lens. In optical instruments, especially for high-precision applications, such as astronomical telescopes, microscopes, etc., the accuracy of lens processing is high.

The following are some common lens processing accuracy requirements:

1. Surface quality: The lens surface should be flat, no bubbles, cracks, scratches and other defects. It is generally required that the smoothness reach a certain standard, which is usually described by optical surface roughness (RMS).

2. Shape accuracy: the curvature radius, sphericity and other shape parameters of the lens should meet the design requirements. Common shape accuracy requirements include spherical error, eccentricity, stray light, etc.

3. Optical performance: the refractive index, focal length, magnification and other optical characteristics of the lens should meet the design requirements. The accuracy requirements for these parameters vary, depending on the application field and requirements.

It should be noted that different lens processing methods and processing processes have different requirements for processing accuracy. For example, precision grinding and polishing can achieve high accuracy, but in some special applications, such as aspherical lenses or lenses with very high precision requirements, more advanced processing methods may be required, such as single point diamond turning or laser processing.

In short, the machining accuracy requirements of optical instrument lenses are based on the specific application requirements, and multiple factors such as surface quality, shape accuracy and optical performance need to be considered comprehensively.