Introduction:
The coaxial Cassegrain collimator is a high-precision optical instrument designed to produce high-quality parallel light beams. Based on the traditional Cassegrain telescope design, it features a compact structure, wide spectral range, chromatic aberration-free performance, and ease of installation and maintenance. It is suitable for applications within a limited field of view, providing exceptional image quality and optical efficiency. The primary and secondary mirrors are symmetrically aligned along the same axis, resulting in a simplified system structure and stable optical performance, making it ideal for applications requiring precise parallel light.
Key Functions:
- Optical axis alignment for multi-axis systems in visible, infrared, and laser wavelengths.
- Basic parameter testing of optical systems using various reticles and additional accessories.
- Infrared imaging quality testing and optical axis alignment with a blackbody source.
- Provides ultra-low divergence angle parallel light.
- Simulates an infinite target.
Optical path diagram：
Standard Components:
- Collimator Main Unit: 1 set
- Filters: 2 pieces (Orange, center wavelength 600nm; Green, center wavelength 532nm)
- Attenuator: 1 piece (Neutral Attenuator 430–730nm)
- Visible Reticles: 12 pieces(Crosshair Reticles*1,Resolution Reticles*5:1#/2#/3#/4#/5#,Star Point Reticles*5: 0.1/0.2/0.01/0.02/0.05,Porro Board*1)
- USAF 1951 Resolution Reticle: 1 piece
- Light Source Assembly: 1 set( 12V30W Halogen Light Source)
- Motorized Target Wheel: 1 set (8 positions)
Custom Components (Applicable to Infrared Reticles):
Infrared targets are formed by machining various patterns into thin metal plates. When illuminated by a blackbody source, the thermal imager under test observes sharp target patterns against a uniform background. A variety of standard infrared targets are available for customization.
Examples of Targets:
- Four-Bar Target: For Minimum Resolvable Temperature Difference (MRTD) testing.
- Circular Target: For Minimum Detectable Temperature Difference (MDTD) testing.
- Slit Target: For Slit Response Function (SRF) testing.
- Cross-Circle Target: For axis alignment, aiming, and focusing.
- Distortion Target: For testing camera distortion in image generation.
- Outline Target: For evaluating target recognition range of the camera under test.
- Square Target: For testing Noise Equivalent Temperature Difference (NETD), Fixed Pattern Noise (FPN), Signal Transfer Function (SITF), and Aperiodic Transfer Function (ATF).
External dimensions:（Unit: mm）
