Products
Catadioptric Lenses
Most of the lenses in this range provide a diffraction limited performance over the total field of view and spectral range for which they are designed. The images are large (>10mm diameter) and because the performance is diffraction limit, they can be used with any CCD to a maximum of 2/3”.
These lenses have been ruggedised and a-thermalised to maintain performance specification over a temperature range of at least -20°C to 60°C.
Special care is taken in the mechanical design to provide effective baffling, thereby minimising glint and the “white-washing” of images when bright sources such as the sun illuminate the front of the lens.
Every lens is tested and the measured MTF graph is supplied with the lens. Note that due to manufacturing tolerances the actual MTF performance is typically 5 to 10% lower than the design graph.
Refracting Lenses
Most of the lenses in this range provide a virtually diffraction limited performance over the total field of view and spectral range for which they are designed. The images are large (>10mm diameter) and because the performance is close to the diffraction limit, they can be used with any CCD to a maximum of 2/3”. The colour correction (either a-chromatic or apo-chromatic) is excellent, and some of the lenses are suitable to be used with any type of CCD, but others should be selected according to the sensor with which they are to be used: colour, B/W or NIR sensitive CCD’s. (See the individual specifications).
These lenses have been ruggedised and a-thermalised to maintain performance specification over a temperature range of at least -20°C to 60°C.
Special care is taken in the mechanical design to provide effective baffling, thereby eliminating glint and the “white-washing” of images when bright sources such as the sun are near the edge of the field of view. Every lens is tested and the measured MTF graph is supplied with the lens. Note that due to manufacturing tolerances the actual MTF performance is typically 5 to 10% lower than the design graph.
Zoom Lenses
This visual zoom lens has been developed for long range surveillance with applications in the security, military and industrial arenas. It fits a narrow HFOV of 1° at FHD 1080p with 25x optical zoom into a 46x 58 x 149.5 mm volume. With the focusing lens and sensor protruding, the overall length is about 175 mm.
Sony produces a well-matched sensor chip having 2592 x 1944 2.2µm pixels, used by several sensor manufacturers. These images should be zoomed electronically by the user (clipped 26%) down to 1920 x 1080 to produce the FHD 1080p high quality image. The user may apply electronic zooming which will increase the full zoom ratio to more than 34x. If no electronic clipping is done when using these sensors, there is some vignetting evident right in the four corners of the image when completely zoomed out to the Wide Field position.
The lens has a simple GUI from where zoom positions and focus distance can be controlled.
Industry leading stepper motors with high precision position calibration, wide operating temperature with built-in temperature compensation, mill-spec vibration qualified, excellent boresight repeatability as well as very low boresight-through-zoom error, all combine in a compact, elegant package, ready for the most demanding airborne, ground and naval applications.
NOTE: CHROMAR Technology preserves the right to change any design or specification in order to improve a product or to more closely reflect actual performance, however, all effort will be made to maintain form and fit while improving function and performance.