Coherent light generators – Particular temperature control – Heat sink
Patent
1994-01-05
1996-05-21
Bovernick, Rodney B.
Coherent light generators
Particular temperature control
Heat sink
372 43, H01S 3043, H01S 318
Patent
active
055197205
ABSTRACT:
A semiconductor light emitting device includes a semiconductor light emitting element mounted on a package stem via a radiating heatsink block, the light emitting point of the light emitting element being positioned on the central axis of the stem and at or near the center of mass of the heatsink block. Another light emitting device includes a light emitting element mounted on a stem via a heatsink block, the light emitting point of the element being positioned on the central axis of the stem with only a portion of a lower surface of the heatsink block close to the central axis of the stem attached to the stem. The movement of the light emitting point with temperature variations is suppressed. Another light emitting device includes a laser chip element mounted on a package stem via a heatsink block, the laser chip element being mounted on the heatsink block so that the emitted light forms an angle .theta. with a surface of the stem and the position and angle of the emitted light do not vary when the temperature changes.
REFERENCES:
patent: 4567598 (1986-01-01), Noguchi et al.
patent: 4763335 (1988-08-01), Chamuel
patent: 4818099 (1989-04-01), Preikschat et al.
patent: 4995687 (1991-02-01), Nagai et al.
patent: 4996169 (1991-02-01), Lee
patent: 5148322 (1992-09-01), Aoyama et al.
Hirano Ryoichi
Omura Etsuji
Shigihara Kimio
Takemoto Akira
Bovernick Rodney B.
McNutt Robert
Mitsubishi Denki & Kabushiki Kaisha
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