Infrared Lens
Ulirvision offers a wide range of range of infrared lens for infrared thermal imaging camera. Below are our featured thermal infrared lensand 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
- ir lensesmakes 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.
Optical Structure of Thermal Imaging Lenses
The mechanical compensation zoom lens has an optical structure consisting of a front fixed group, a zoom group, a compensation group, and a rear fixed group.
Front fixed group: its role is to provide a fixed image to the system;
Zoom group: It is responsible for the zooming effect of the system, and linear movement to change the focal length;
Compensation group: non-linear motion according to a certain curve trajectory to compensate the image plane movement generated by the variable magnification group during the zooming process;
Rear fixed group: used to convert the image of the compensation group into the final real image of the system, and adjust the synthetic focal length value of the system and the device aperture stop to ensure that the relative aperture of the system does not change during the zooming motion.
Focusing Mechanism of IRZoom Lens
The cam is adjusted.
Focusing with a linear motor.
Screw nut adjustment.
If you want to know more kinds of high quality thermal camera, please visit our website.
Zhejiang ULIRVISION Technology Co., Ltd. (ULIRVISION) is dedicated to researching, designing, manufacturing, integrating the IR and UV systems. Since the establishment in 2005, Zhejiang ULIRVISION Technology Co., Ltd.has served its clients worldwide with cutting-edge technology in handheld thermal imaging camera, thermal imaging cores, thermal night vision systems, thermal surveillance camera, and corona cameras.
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