Planewave Europe

PlaneWave IRDK17 Dall-Kirkham f/6.8

This is a Dall-Kirkham optical design with coatings that are optimized to transmit in infrared wavelengths. There are no refractive lens, only reflective components to the design. For IR application, reflective 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 be provided as well, so please reach out to our technical sales team to discuss UV optimization.

IRDK 17 Astrograph, 17 inch Infrared optimized with Fused Silica Optic
A Dall-Kirkham optical design with coatings that are optimized to transmit in infrared or ultra violet wavelengths
8" Dovetail, focal length 2.939 mm (f/6.8)
Delta T Ready, 3,5" Hedrick Focuser (without EFA Kit)
Requires a crating #1323517. The crating will be charged extra

Fused Silica

Fused Silica is a synthetic amorphous silica glass of the highest purity and one of the most transparent glasses made. The optical and thermal properties of fused silica are superior to other types of glass due to its purity. Its transmission and homogeneity exceed those of crystalline quartz without the problems of temperature instability inherent in the crystalline form. Fused Silica has a coefficient of thermal expansion six times lower than Borosilicate (Pyrex) glass, which means that as fused silica cools down, it preserves its shape to a high degree of accuracy. This translates into consistent optical performance and unchanging focus over temperature changes. With its high melting temperature ()~ 1.600 degree Celsius), a very low coefficient of thermal expansion and resistance to thermal shock, fused silica is the material of choice for professional observatories as well as various scientific applications.

Scope of delivery

Heating elements for dew prevention – The heating pads on the primary and secondary mirror require the #1329110 Delta-T controller and sold separately
OTA cover – To protect the primary mirror and inside of the optical tube
Flash Drive – Contains software and instructions for collimation and spacing the primary to the secondary mirror
Wrench set (5812A35) – Standard hex wrenches (European orders only)
Soft cover for secondary mirror
12v AC adapter