A Word About Coatings - Motorola Symbol SE4400 Integration Manual

A Word About Coatings

In all cases, adhere to the minimum tilt angle specified in
SE4400 is set to an exposure time less than 10 milliseconds and gain less than 127, anti-
reflection coating is not necessary (see
consider single-side or double-side AR coatings. If using an anti-reflective coating,
polysiloxane coating is not required. Recess the exit window to minimize scratches and
digs.
If using an anti-reflective coating, the specifications in
Material
AR Coating Specification 1. One side tempered AR coating: 92% minimum within spectrum
Exposure & Gain Control
Table 2-3. AR Coatings Specifications
Both tempered glass and plastic (e.g., CR-39 or hard coated acrylic)
exit windows can be AR coated. AR coated glass is easier and more
durable because of a better adhesion property on the glass structure.
In addition, it can be more cost effective to put an AR coating on the
glass substrate rather than on the plastic.
range from 450nm to 700nm.
2. Double side AR coating: One side AR coating must be 97%
minimum within spectrum range from 450nm to 700nm.
Table 2-4 on page
on page 5-16). Otherwise,
Table 2-3 apply.
Installation
2-9. When the
2-7