The PlaneWave 17" Optimised is a Dall-Kirkham optical design with coatings that are optimized to transmit in infrared or ultra violet 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. For IR application, 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. UV optimized coatings can also be used at an additional cost.
OPTICAL SYSTEM
| Aperture | 17" |
| Focal Length | 2938 mm |
| Central Obstruction | 48% of the Primary Mirror Diameter, 8.27 inch |
| Back Focus | 10.24" from focuser mounting surface, 5.8" from racked in focuser |
| Weight | 106 lbs |
| OTA Length | 37" |
| Optical Tube | Carbon Fiber |
| Upper Cage | Carbon Fiber Truss |
| Lower Cage | Carbon Fiber Truss with Carbon Fiber light shroud |
| Dimensions | Overall Dimensions |
SECONDARY MIRROR
| Diameter | 6.25 inch |
| Material | Precision Annealed Pyrex |
| Shape | Spherical |
| Coating | Protected Gold Reflective Coating - 98% (.65-16micron) |
SECONDARY MIRROR
| Material | Precision Annealed Pyrex |
TERTIARY MIRROR
| Material | Precision Annealed Pyrex |
STANDARD FEATURES
| Carbon Fiber Truss Design | Minimizes thermal expansion which causes focus shift with changes in temperature |
| Dovetail expansion joint | Allows for the difference in thermal expansion between carbon fiber and aluminium. The expansion joint allows the aluminium dovetail expand and contract without stressing the carbon fiber lower truss |
| Cooling Fans | Three cooling fans ejecting air from the back of the telescope and four fans blowing across the boundary layer of the mirror surface. This helps the telescope to reach thermal equilibrium quickly. The fans are controlled by a computer if the optional Electronic Focus Accessory (EFA Kit) is purchased. |
SHIPPING DIMENSIONS AND WEIGHT
Crate Dimensions: 148cm x 77cm x 94cm (58" x 30" x 37")
Crate Shipping Weight: 105kg (225 lbs)
NOTE: This product has a lengthy leadtime, for more information email: education@bintel.com.au