The 532nm-transmitting/650nm-reflecting lens is an optical component with specific wavelength selectivity. Its core function is to allow light at 532nm wavelength (green light) to pass through while highly reflecting light at 650nm wavelength (red light). It is commonly used in optical systems requiring light path separation or indication.

Wavelength Selectivity Principle

• Transmission Characteristics: For 532nm green light, the lens typically achieves a transmission rate of ≥90%, ensuring efficient passage of the target wavelength.
• Reflection Characteristics: It achieves high reflection (reflectance can reach over 99%) for 650nm red light, with the reflection direction following the rule of 90-degree rebound at 45-degree incidence.
• Substrate and Coating: Optical glass or quartz is used as the substrate, and multilayer dielectric films are formed through vacuum coating technology to achieve selective transmission and reflection for 532nm and 650nm wavelengths.