PlaneWave Infrared Dall-Kirkham Optical Tube Assembly 20"
This is a Dall-Kirkham optical design with coatings that are optimized to transmit in infrared wavelengths. It is diffraction limited across a 20mm image circle at the focal plane. There are no refractive lens, only reflective components to the design. The reflectives coatings are a protected gold which give better than 98% reflectivity from .65 micron (650nm) to 5 micron (5000nm). This design is ideal for infrared astronomy or LIDAR applications.
|Backfocus Distance||8.9" from focuser mounting surface, 5.81" from racked in focuser|
|Central obstruction||39% of the Primary Mirror Diameter|
|Focal Length||3454 mm|
|Material (primary mirror)||Precision Annealed Pyrex|
|Mounting (primary mirror)||Laser Collimated and Permanently Fixed|
|Optical Coatings||Protected Gold Reflective Coating - 98% (.65-16micron)|
|Optical Tube Length||47"|