H - Electricity – 01 – S
Patent
H - Electricity
01
S
H01S 3/08 (2006.01) G01C 15/00 (2006.01) G02B 3/02 (2006.01) H01S 5/10 (2006.01)
Patent
CA 2403642
The invention is to provide a synthetic resin-made concave cone lens for radiating a standard laser line in a low cost in that accuracy of irradiation of a standard laser line can be assured, occurrence of defective products can be prevented, and advantages in production cost owing to mass production can be sufficiently enjoyed. In the structure of the synthetic resin-made concave cone lens, a reflective surface is formed by forming a reflective film on a particular surface of a concave cone lens main body produced with a thermoplastic synthetic resin having translucency and an arbitrary refractive index by injection molding means, an apex angle of a cone concave part formed on the concave cone lens main body is determined by the refractive index of the thermoplastic synthetic resin material and such a releasing angle larger than an ordinary releasing slant angle that a parting line is arranged on one end of an outer circumference of an outer wall of the cone concave part, an irradiation part is formed with a circumference formed by the releasing slant angle, and the incident end surface of the laser beam, an inner surface of the cone concave part and a circumference surface of the irradiation part are formed to be mirror surfaces, whereby a laser beam, which is emitted from a semiconductor laser light source, is radiated to a direction perpendicular to the center axis line of the concave cone lens main body.
Teraji Norihisa
Terauchi Isshu
Marks & Clerk
Nissho Corporation
LandOfFree
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