Optical Filters (Dichroic, Colored Glass, Bandpass)

04 Nov 2024

Optical filters are used to selectively transmit specific wavelengths of light. Shanghai Optics manufactures a variety of filters for various applications, including:

Dichroic Filters:

• Single substrate with a hard, dense coating.
• Expensive but highly precise and durable.
• Manufactured using cutting-edge IBS technology.
• Thinner and offer higher transmission than traditional coated filters.

Colored Glass Filters:

• Simple glass substrate with injected dye.
• Less expensive and highly stable.
• More limited optical properties compared to dichroic filters.

Shortpass, Longpass, and Bandpass Filters:

• Shortpass filters: Block longer wavelengths, allowing shorter wavelengths to pass.
• Longpass filters: Block shorter wavelengths, allowing longer wavelengths to pass.
• Bandpass filters: Transmit a specific range of wavelengths (passband) and block others.
• Both shortpass and longpass filters are sometimes called edge filters.

https://www.shanghai-optics.com/components/optical-filters/