What are the processing techniques for optical lenses

The optical lens processing technology mainly includes the following core steps:

Blank forming

From raw materials such as glass or plastic, lens blanks are formed through processes such as sawing, rolling, and ball opening to ensure geometric shape and dimensional accuracy.  

Rough grinding

Use diamond grinding wheel or silicon carbide abrasive to remove excess material on the surface of the blank, preliminarily form and remove bubbles and impurities, with a surface roughness of approximately Ra 1-10 μ m.  

Fine grinding

Using finer abrasives (such as diamond micro powder) for precision machining through planetary or oscillating grinding machines, the surface roughness is reduced to Ra 0.1~1 μ m, and the shape accuracy is improved to λ/10~λ/20.  

Grinding

Using cerium oxide or aluminum oxide polishing powder, combined with asphalt polishing molds or polyurethane polishing pads, the surface is optimized through computer-controlled optical surface forming technology to achieve roughness of Ra<1nm and surface shape accuracy of λ/20~λ/50.  

wash

Remove abrasive residue, grease, and dust from grinding through ultrasonic cleaning, chemical cleaning, or plasma cleaning to ensure the quality of subsequent coating.  

coating

Coating multiple layers of film (such as anti reflection film, anti reflection film) on the surface of the lens to improve light transmittance and wear resistance.  

Inspection

Automated equipment is used to detect indicators such as lens shape, size, and transmittance to ensure compliance with standards.