Laser beam energy profile synthesizer
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United States of America Patent
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-
Nov 12, 1985
Grant Date -
N/A
app pub date -
Apr 25, 1984
filing date -
Apr 25, 1984
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The annular energy distribution in the output beam of a laser having an unstable resonator is evenly distributed across the entire beam profile by a synthesizer comprising a pair of mirrors adjacent to the output end of the resonator and operative on the output beam to redirect part of the beam from the annular outer portion to the energy-vacant central portion. One of the pair of mirrors is partially optically transmissive and concavely shaped and is disposed to reflect and converge part of the outer beam portion toward the other mirror and to transmit the balance. The other mirror is highly reflective and convexly shaped and is disposed to redirect and collimate the reflected beam part within the central portion toward the concave mirror parallel to the outer beam portion. Part of the twice reflected beam is transmitted through the concave mirror and the balance is again reflected and further converged toward the convex mirror as the cycle is repeated several times to synthesize an output beam with a substantially uniform energy profile.
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