Chapter-2
Before Using
NLV-5201 User's Manual
28
1st
Exit Window Placement
2.12
LED illumination appears to the exit window depending on the exit window material and placement.
The distance and angle limitation to prevent this are described below.
Exit Window Material
2.12.1
Below is a list of recommendations for constructing the exit window. These recommendations help to
prevent reflection from the LED illumination off the exit window and help to prevent degradation of the
image by scratches and dirt.
● For the best optical quality, use an acrylic material (cast or extruded)
● Select a high-quality achromatic acrylic material with a smooth, flat surface without scratches and
dents.
● Use acrylic material with an anti-reflective (AR) coating applied to both sides.
● Apply an anti-scratch coating to the surface of the exit window to protect it from scratches during
operation.
● Hard coated acrylic sheets are readily available. Such a coating greatly enhances anti-scratch
properties without degrading the optical characteristics of the acrylic material.
Recommended acrylic material:
Nitto Jushi Kogyo Co., Ltd.
Clarex Precision Thin Sheet
MITSUBISHI CHEMICAL CO., LTD.
Shinkolite
LED illumination appears to the exit window
