Achromatic illumination system for small targets

Patent · Mon Jan 01 04:00:00 EST 1979

OSTI ID:863276

Sigler, Robert D ^[1]

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1. Ann Arbor, MI

A pair of light beams is directed to provide illumination that is substantially uniform from all directions on a small target by a system comprising a pair of corrector windows, a pair of planar reflecting surfaces, a pair of paraboloidal mirrors and a reflecting mirror cavity. The components are arranged so that each of the beams passes through a corrector and is reflected from the planar surface to the paraboloidal mirror, from which it is focused through a hole in the planar surface to the interior of the cavity. The surface of the interior portion of the cavity is shaped to reflect the focused beam three times before the focused reflected beam strikes the target.

• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 4136926
• OSTI ID: 863276
• Country of Publication: United States
• Language: English

Related Subjects

/359/362/376/
achromatic
arranged
beam
beams
beams pass
cavity
components
comprising
corrector
directed
directions
focused
focused beam
illumination
interior
interior portion
light
light beam
light beams
mirror
mirrors
pair
paraboloidal
paraboloidal mirror
paraboloidal mirrors
passes
planar
planar surface
portion
provide
reflect
reflected
reflected beam
reflecting
reflecting mirror
reflecting surface
reflecting surfaces
shaped
strikes
substantially
substantially uniform
surface
surfaces
target
targets
times
uniform
windows