User`s manual

Lake Shore MTD Series Cryotest System User’s Manual

Filter Wheel Assemblies G-1

APPENDIX G

FILTER WHEEL ASSEMBLIES

G1.0 GENERAL

This appendix will describe typical operation of the optional filter wheel assembly used with the MTD

Cryotest System.

G2.0 DESCRIPTION

Filter wheel assemblies allow optical testing of infrared focal plane arrays with multiple filters. The filter

wheel is coupled via a drive shaft assembly which protrudes through the vacuum chamber base plate.

There it connects to a multiple-turn drive mechanism with a digital position indicator. A three-digit

readout allows for precise alignment of each filter with the optical axis. Up to two filter wheels may be

factory installed at time of initial order. Each accommodates eight 1-inch filters.

C-MTD-G-1.eps

Figure G-1. Typical MTD with Optional Filter Wheel Assembly