Ulirvision offers a wide range of range of infrared lens for infrared thermal imaging camera. Below are our featured thermal infrared lens and key factors need to consider for choosing ir camera lens.

Thermal Infrared Lens

Manual Lens

Focal Length (mm)F NumberAdapter DetectorField of ViewRear Working Distance (mm)InterfacePhysical DimensionWorking TemperatureCoating Waterproof RatingCoatingManual Lens351.0640*512-17μm17.7°*14.2°...

Athermalized Lens

Focal Length (mm)F NumberAdapter DetectorField of ViewRear Working Distance (mm)InterfacePhysical DimensionWorking TemperatureCoating Waterproof RatingCoatingAthermalized Lens91.0640*480-17μm72.8°*5...

Motorized Lens

Focal Length (mm)F NumberAdapter DetectorField of ViewRear Working Distance (mm)InterfacePhysical DimensionWorking TemperatureCoating Waterproof RatingCoatingMotorized Lens501.0640*512-17μm12.4°*9.9...

Dual Lens

Focal Length (mm)F NumberAdapter DetectorField of ViewRear Working Distance (mm)InterfacePhysical DimensionWorking TemperatureCoating Waterproof RatingCoatingDual Lens44/1321.0/1.1640*512-17μm14.1°*...

Zoom Lens

Focal Length (mm)F NumberAdapter DetectorField of ViewRear Working Distance (mm)InterfacePhysical DimensionWorking TemperatureCoating Waterproof RatingCoatingZoom Lens25~750.9~1.1640*512-17μm24.6°*1...

Optical System for Infrared Zoom Lens

1. Optical compensation zoom system: When several sets of lenses are used for zooming and compensating in the zoom objective lens, the movement of each lens group is performed at the same direction, so that it is only necessary to connect the lens groups together in a simple mechanical structure for linear operation. Since the optical compensation zoom system cannot completely compensate for the image plane displacement, the moving group must be moved to a certain special position to obtain a stable and clear image surface, and the focal length is difficult to achieve continuous change, but several discrete values, so the usage is limited. However, it simplifies the mechanical structure and is beneficial to control the accuracy of the optical axis; and only uses a set of electromechanical control systems to achieve zooming and focusing, thereby reducing the cost and weight of the system, but the design difficulty is relatively large.

2. Mechanical compensation zoom system: It means that each movement component is relatively complex and different corresponding movement according to different motion laws, and finally achieves the purpose of preventing image surface movement. Mechanically compensated zoom lens: one set of ir lenses makes a linear movement (known as a zoom group) to change the focal length, and the other set of lenses (commonly called the compensation set) makes a small amount of nonlinear motion to compensate for the image plane displacement to achieve optical system zooming. The image position is stable. The variable magnification group is generally a negative lens group, and the compensation group has a positive lens group and a negative lens group. The movement of the compensating lens group is different from the moving direction of the variator lens group and is not constant speed, but their relative motions have a strict correspondence relationship, and each lens group realizes relative motion by a complicated cam mechanism. The focal length of such a zoom lens continuously changes within a certain range.