Optical filters are a class of optical elements that selectively transmit, reflect, cut off, or attenuate spectral wavelengths.

Based on their function, they can be classified into bandpass filters, long-pass filters, short-pass filters, dichroic filters, neutral density filters (ND filters), notch filters, cold reflective mirrors, hot reflective mirrors, and color filters. Based on their manufacturing process, they can be classified into interference filters and color absorption filters. These filters are widely used in industries and products such as spectral analysis, biomedicine, machine vision, fluorescence microscopy, and industrial automation.

Bandpass filters selectively allow certain wavelengths of light to pass through while blocking others within their spectral range. Neutral density filters (ND filters) reduce luminous flux by decreasing transmittance within a specified spectral wavelength range, thus protecting sensors and electronic components; they are widely used in laser optics and optoelectronics. Cold/hot reflectors selectively reflect and transmit longer wavelengths of light within a specific spectral range and are widely used in lighting systems to effectively dissipate heat generated during illumination.

CLZ Optical Co., Ltd.  is a standard supplier of optical filters. We not only offer a large stock of standard filters but also provide custom-made filters to meet your specific needs.