Light beam expanding device, image display device, and optical device
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United States of America Patent
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Aug 8, 2017
Issued Date -
N/A
app pub date -
Jul 13, 2015
filing date -
Nov 22, 2011
priority date (Note) -
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Abstract
An image display device includes an image generating device, a light guide unit, and a light beam expanding device. The light guide unit includes a light guide plate, a first deflector, and a second deflector. The light beam expanding device expands a light beam incident from the image generating device along the Z direction and outputs the light beam to the light guide unit when the incident direction of light incident on the light guide plate is defined as the X direction and the propagation direction of light in the light guide plate is defined as the Y direction. The light beam expanding device is composed of a first reflective mirror on which light from the image generating device is incident and a second reflective mirror on which light from the first reflective mirror is incident and that outputs light to the light guide unit.
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