An infrared cutoff filter is an optical filter that uses precise optical coating technology to alternately deposit high and low refractive index optical films on an optical substrate. This filter achieves high transmittance in the visible light region (400-630nm) and cutoff in the near-infrared region (700-1100nm).
The cut-off filter is a type of filter that blocks all light outside a certain wavelength range. It can be categorized into dye absorption type, interference and dye combination type, etc. Commonly used interference and dye combination cut-off filters determine the highest transmission band through an interference filter film, and then use colored glass to absorb all other wavelengths of light, producing a distinct cut-off light source. These filters are widely used in fields such as infrared photography and ultraviolet photography.
Cut-off filters play an important role in camera modules. Since the human eye and image sensors respond differently to various wavelengths of light, the human eye cannot see infrared light, but sensors can detect it. Therefore, an infrared cut-off filter (IR CUT Filter) is needed to block infrared light and eliminate its impact on the image sensor, ensuring that the output image meets the visual requirements of the human eye.
Used in industrial imaging equipment, mobile phone telescopes, digital cameras, digital telescopes, digital microscopes, security cameras (CMOS and CCD models), digital camcorders, building surveillance systems, and digital camera lens systems.
Used in financial systems, large enterprises, financial companies, credit enterprises, public security, border defense, security inspection, customs, police stations, and the authentication of ancient texts and paintings.
Used in biological detection instruments, fingerprint imaging, industrial imaging equipment, mobile phone telescopes, digital cameras, digital telescopes, digital microscopes, security cameras (CMOS and CCD models), digital camcorders, building surveillance systems, and digital camera lens systems.
Used in fiber optic lighting, LED lighting, halogen lamp heat insulation, light engines, infrared cut-off filters for digital cameras to eliminate CCD near-infrared interference, ensuring the normal operation of optoelectronic instruments and equipment.
| switching wavelength (nn) | Specifications |
| 330 | Tave>90%@400-580nm, T=50%@630 +/-10nm, Tave<5%@680-1100nm |
| 330 | Tave>90%@400-580nm, T=50%@630 +/-10nn, Tave<5%@680-1100nn |
| 535 | Tave>90%@420-600nm, T=50%@635 +/-10nn, Tave<5%@680-1100nm |
| 635 | Tave>90%@420-600nm, T=50%@635 +/-10nm, Tave<5%@680-1100nm |
| 645 | Tave>90%@420-600nm, T=50%@645 +/-10nm, Tave<5%@700-1100nm |
| 645 | Tave>90%@420-600nm, T=50%@645 +/-10nm, Tave<5%@700-1100nm |
| 650 | Tave>90%@420-600nm, T=50%@650 +/-10nm, Tave<5%@700-1100nm |
| 550 | Tave>90%@420-600nm, T=50%@650 +/-10nm, Tave<5%@700-1100nm |
| 680 | Tave>90%@420-630nm, T=50%@680 +/-10nm, Tave<5%@730-1100nm |
| 580 | Tave>90%@420-630nm, T=50%@680 +/-10nm, Tave<5%@730-1100nm |
| 690 | Tave>90%@420-640nm, T=50%8690 +/-10nm, Tave<5%@740-1100nm |
| 690 | Tave>90%@420-640nm, T=50%8690 +/-10nm, Tave<5%@740-1100nm |
| 700 | Tave>90%@420-650nn, T=50%@700 +/-10nm, Tave<5%@750-1100nm |
| 700 | Tave>90%@420-650nm, T=50%@700 +/-10nm, Tave<5%@750-1100nm |
| 705 | Tave>90%8420-650nm, T=50%8705 +/-10nm, Tave<5%8750-1100nm |
| 705 | Tave>90%8420-650nm, T=50%@705 +/-10nn, Tave<5%@750-1100nm |
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