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US 5,349,604 AGranted
Semiconductor laser source
AssigneeRohm Co., Ltd.
InventorNaotaro Nakata
Life of this patent
Estimating the term…
Abstract
A laser diode and a lens are fixed onto a laser fixing member. A laser beam emitted from the laser diode passes through the lens, and a part of the laser beam passes through a pinhole provided to a beam restricting plate. The pinhole is formed so that its diameter is smaller than the laser beam diameter at the beam restricting plate. The laser beam is transmitted therethrough while being diffracted.
Claims14
A semiconductor laser source comprising:
- beam emitting means including a semiconductor laser for emitting a laser beam;
- an optical system transmitting and collimating the laser beam emitted from said beam emitting means;
- and
- a beam restricting member provided with an aperture of a size which is predetermined so that a central portion of the laser beam from said optical system is transmitted and diffracted while a remaining nonuniform portion of the laser beam is removed.
1 more element
A semiconductor laser source comprising:
- beam emitting means including a semiconductor laser for emitting a laser beam;
- an optical system transmitting and collimating the laser beam emitted from said beam emitting means;
- a fixing member fixing said beam emitting means and said optical system;
- and
- a beam restricting member provided with an aperture of a size which is predetermined so that a central portion of the laser beam from the optical system is transmitted and diffracted while the other nonuniform portion of the laser beam is removed.
2 more elements
Dependencies are inferred from the claim text.