DEK 265 horizon Engineering Specification page 15

Chapter Issue 1 May 00
Direct lighting is achieved by a block of six LEDs shining through a diffuser to
produce a very uniform light source. The light is passed through a cube beam
splitter which increases the illumination and the range of angles reaching the
board.
Board
LED Array
Indirect /Oblique lighting is used in addition to direct lighting to produce light
paths between 25° and 50° to create uniform illumination, eliminating hot spots
of light.
An array of 12 LEDs sited in a polished ring around the lens aperture produce a
light source which is reflected and scattered by the polished surface and the
white paint of the assembly to the fine ground conical inner ring. This produces
very uniform illumination which is radiated in all directions providing a very
balanced illumination of the board.
Board
LED Array
Engineering Specification
ENGINEERING SPECIFICATION
KEY FEATURES
Light paths
between 0 and 25
50/50 Beam Splitter
Diffuser
Light paths
between 25 and 50
Inner Ring
9