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Night Vision Infrared Lens 850nm NIR Camera Optics High Transmission 25.4mm

Quality Night Vision Infrared Lens 850nm NIR Camera Optics High Transmission 25.4mm factory
Product Specification
Place of Origin: Guangdong, China
Brand Name: ECER Optics
Certification: ISO 9001:2015
Model Number: IRL-NV850
Minimum Order Quantity: 10 Pieces
Price: USD 10-80 / Piece
Payment Terms: T/T,PayPal,Western Union
Supply Ability: 20000 Pieces per Month
Product Details
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Night Vision Infrared Lens

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850nm NIR Camera Optics

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High Transmission IR Lens
Product Name: Night Vision Infrared Lens
Application: Low Light And Night Vision Camera
Wavelength: 850nm NIR
Coating: NIR AR Ravg<0.5%
Transmission: >98% @ 850nm
Diameter: 25.4mm
Material: Optical Glass N-BK7
Surface Quality: 40-20 Scratch-Dig
Product Description
Night Vision Infrared Lens 850nm NIR Camera Optics High Transmission 25.4mm
This night vision infrared lens is optimized for 850nm near-infrared illumination, the wavelength used by the majority of IR LED illuminators in security and surveillance cameras. The 25.4mm lens is manufactured from optical glass with an NIR anti-reflective coating that keeps transmission above 98 percent at 850nm, ensuring that the camera captures the maximum return from its IR illuminator in complete darkness.
For night vision camera systems, the infrared lens is the component that determines how far the camera can see when visible light is gone. The optical design corrects for chromatic aberration across the visible to near-infrared range, so the lens holds focus between daytime color imaging and nighttime IR imaging without adjustment.
Each night vision infrared lens is polished to a 40-20 scratch-dig surface quality and verified for NIR transmission with a spectrophotometer. Custom focal lengths from 4mm wide angle to 50mm telephoto, fixed or varifocal versions, and board-level or C-mount formats are available for IP cameras, analog cameras, and low light imaging modules.
Technical Specifications
Product Name Night Vision Infrared Lens
Wavelength 850nm NIR Optimized
Diameter 25.4mm
Coating NIR AR Ravg<0.5% @ 850nm
Transmission >98% @ 850nm
Material Optical Glass (N-BK7 / H-K9L)
Surface Quality 40-20 Scratch-Dig
Focus IR Corrected, Day/Night Stable
Application Low Light and Night Vision Camera
Certificate RoHS Compliant, ISO 9001:2015
Key Advantages
  • 850nm optimized coating captures maximum IR illuminator return
  • Day and night focus stability without mechanical adjustment
  • High transmission extends effective night vision range
  • Chromatic aberration corrected across visible and NIR
  • Custom focal length from 4mm to 50mm for any field of view
  • Fixed, varifocal, and board-level formats available
  • 40-20 surface quality ensures clean imaging in low light
  • Ideal for IP cameras, analog cameras, and AI edge devices
Night vision performance is a system calculation: illuminator power, sensor sensitivity, and lens transmission all contribute to how far the camera can see. This night vision infrared lens is specified with measured 850nm data so system designers can calculate detection range with confidence instead of relying on estimates.
Field experience across residential, commercial, and industrial surveillance programs shows that cameras fitted with high transmission NIR lenses require less illuminator power for the same range, which reduces power consumption and light pollution. The lens is also suitable for AI camera applications that use NIR illumination for facial recognition and license plate capture in darkness.
Product Q&A
Q: Why is 850nm the standard wavelength for night vision cameras?
850nm sits in the near-infrared where silicon sensors remain sensitive and IR LED illuminators are efficient and inexpensive. It is bright enough for useful illumination while being less visible to the human eye than shorter wavelengths, which is why most security cameras and their illuminators are built around 850nm.
Q: Does the lens keep focus between day and night modes?
Yes. The optical design is corrected for the focus shift between visible light and 850nm NIR, so the image stays sharp when the camera switches from color day mode to black and white night mode. This removes the need for motorized IR compensation in many applications.
Q: Can you supply a complete lens assembly for our camera board?
Yes. We provide board-level lenses with M12 or M8 mounts, and C/CS mount versions for larger sensors. Send us your sensor size, pixel pitch, and housing envelope, and we will match the focal length and back focal length to your module.
Q: How is NIR transmission verified?
Each batch is measured with a spectrophotometer at 850nm and across the 400-1000nm range, and the measured curve is included with the shipment. Transmission at 850nm is guaranteed above 98 percent.
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