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RSLS75F1.5-640-25
Rising
Short Wave Infrared Lens Description:
Focal Length 75mm F1.5 Near Wave Infrared Lens, Germanium Lens For 640x480-25um Detector.
0.9um-1.7um Short Wavelength Infrared Germanium Lens For Infrared Optics, Infrared Sights, Monitor Camera, Drone Monitor, Infrared Camera, Thermal Imager, etc.
The SWIR imaging technology based on the InGaAs focal plane mainly has the following characteristics.
1) Low-light night vision: Under the night vision conditions of atmospheric glow, the photon irradiance is mainly distributed in the SWIR band range of 1.0-1.8um, which makes SWIR night vision imaging more effective than visible light night vision imaging. Significant inherent advantages; image details can be extracted in deep shadows, and can penetrate window glass for imaging, especially suitable for use in dark places or at night.
2) Stealth active imaging: In the 0.9-1.7um band, the military laser light source technology is mature (1.06um, 1.55um), which makes SWIR imaging have a significant comparative advantage in stealth active imaging applications;
3) Optical configuration is simple: SWIR light can penetrate glass, SWIR camera does not need a special housing, only needs to be equipped with a protective window glass, and it has great flexibility when applied to a specific platform or occasion.
Short Wave Infrared Lens Parameters:
| Product Name | Near Wave Infrared Lens |
| Focal Length | 75mm |
| F# | 1.5 |
| Image Diagonal | 20mm |
| Average Transmission | ＞80% |
| Circular FOV | (H)12°x(V)9°x(D)15° |
| Back Focus Distance | 17.526mm |
| Back Working Distance | 12.526mm |
| Back Focus Length | 21.98mm |
| Dimensions | 90mm / 131.4mm |
| Focus Type | Manual Focus |
| Focus Range | 3m to infinity |
| Mount Type | Manual Focus |
| Focus Range | C-Mount |
| Detector | 640x480-25um |
| Weight | 1035g |
| Operating Temperature | -40℃ to +80℃ |
| Storage Temperature | -40℃ to +80℃ |
| External Coating | AR Coating Available |
FAQ:
What Is An AR Coating?
Anti-reflective coating (English: Anti-reflective coating, AR) is a surface optical coating that increases transmittance by reducing light reflection. In complex optical systems, it can improve contrast by reducing scattered light in the system.
Many coatings include transparent film structures with different refractive indices. The thickness of the film determines the wavelength of the reflected light that it acts on. When light is reflected twice on the AR coating, it will interfere with the original reflected light, thereby weakening the reflected light. According to the conservation of energy, the energy of light does not change. Therefore, when the reflected light decreases, the transmitted light increases. This is the principle of AR coating. Generally, when choosing an AR coating, you need to determine the wavelength, such as infrared, visible and ultraviolet.
Short Wave Infrared Lens Description:
Focal Length 75mm F1.5 Near Wave Infrared Lens, Germanium Lens For 640x480-25um Detector.
0.9um-1.7um Short Wavelength Infrared Germanium Lens For Infrared Optics, Infrared Sights, Monitor Camera, Drone Monitor, Infrared Camera, Thermal Imager, etc.
The SWIR imaging technology based on the InGaAs focal plane mainly has the following characteristics.
1) Low-light night vision: Under the night vision conditions of atmospheric glow, the photon irradiance is mainly distributed in the SWIR band range of 1.0-1.8um, which makes SWIR night vision imaging more effective than visible light night vision imaging. Significant inherent advantages; image details can be extracted in deep shadows, and can penetrate window glass for imaging, especially suitable for use in dark places or at night.
2) Stealth active imaging: In the 0.9-1.7um band, the military laser light source technology is mature (1.06um, 1.55um), which makes SWIR imaging have a significant comparative advantage in stealth active imaging applications;
3) Optical configuration is simple: SWIR light can penetrate glass, SWIR camera does not need a special housing, only needs to be equipped with a protective window glass, and it has great flexibility when applied to a specific platform or occasion.
Short Wave Infrared Lens Parameters:
| Product Name | Near Wave Infrared Lens |
| Focal Length | 75mm |
| F# | 1.5 |
| Image Diagonal | 20mm |
| Average Transmission | ＞80% |
| Circular FOV | (H)12°x(V)9°x(D)15° |
| Back Focus Distance | 17.526mm |
| Back Working Distance | 12.526mm |
| Back Focus Length | 21.98mm |
| Dimensions | 90mm / 131.4mm |
| Focus Type | Manual Focus |
| Focus Range | 3m to infinity |
| Mount Type | Manual Focus |
| Focus Range | C-Mount |
| Detector | 640x480-25um |
| Weight | 1035g |
| Operating Temperature | -40℃ to +80℃ |
| Storage Temperature | -40℃ to +80℃ |
| External Coating | AR Coating Available |
FAQ:
What Is An AR Coating?
Anti-reflective coating (English: Anti-reflective coating, AR) is a surface optical coating that increases transmittance by reducing light reflection. In complex optical systems, it can improve contrast by reducing scattered light in the system.
Many coatings include transparent film structures with different refractive indices. The thickness of the film determines the wavelength of the reflected light that it acts on. When light is reflected twice on the AR coating, it will interfere with the original reflected light, thereby weakening the reflected light. According to the conservation of energy, the energy of light does not change. Therefore, when the reflected light decreases, the transmitted light increases. This is the principle of AR coating. Generally, when choosing an AR coating, you need to determine the wavelength, such as infrared, visible and ultraviolet.
