Motorola MS4404 사용자 설명서

Getting Started

2 - 5

Glass is a hard material which provides excellent scratch and abrasion resistance. However, unannealed glass is 
brittle. Increasing flexibility strength with minimal optical distortion requires chemical tempering. Glass cannot be 
ultrasonically welded and is difficult to cut into odd shapes.

 lists some exit window manufacturers and anti-reflection coaters.

Apply an anti-reflection coating to the inside and/or outside of the window to significantly reduce the amount of light 
reflected off the window, back into the imager engine. The coating can also improve the range of acceptable window 
positions and minimize performance degradation due to signal loss as the light passes through the window. Using 
anti-reflection coatings on both the inside and outside of the window is highly recommended.

Material

Clear cell-cast acrylic.

Spectral Transmission

85% minimum from 640 to 690 nanometers.

Thickness

0.059 ± 0.005 

Wavefront Distortion (transmission)

0.2 wavelengths peak-to-valley maximum over any 
0.08 in. diameter within the clear aperture.

Clear Aperture

To extend to within 0.04 in. of the edges all around.

Surface Quality

60-20 scratch/dig

Coating

Both sides to be anti-reflection coated to provide 
0.5% max reflectivity (each side) from 640 to 690 
nanometers at nominal window tilt angle. Coatings 
must comply with the hardness adherence 
requirements of MIL-M-13508.