Motorola Symbol SE4400, Руководство по интеграции

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2-7
Installation
A Word About Coatings
In all cases, adhere to the minimum tilt angle specified in Table 2-4 on page 2-9 . When the
SE4400 is set to an exposure time less than 10 milliseconds and gain less than 127, anti-
reflection coating is not necessary (see
Exposure & Gain Control on page 5-16). Otherwise,
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 Table 2-3 apply.
Table 2-3. AR Coatings Specifications
Material 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.
AR Coating Specification 1. One side tempered AR coating: 92% minimum within spectrum
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.