Kabushiki Kaisha Topcon

Michiyo Saito

Kunihiro Hayashi

Etsuji Gohdo

Takashi Maezawa

A laser beam projecting device, comprising a laser light source for emitting a laser beam, a wavelength selecting film for allowing the laser beam from the laser light source to. pass, and a birefringent optical member arranged on an optical axis closer to an exit side than the wavelength selecting film, wherein the wavelength selecting film is tilted so that an incident angle of the laser beam is in a range of 45&#xb0; to 80&#xb0;.

Laser beam projecting device

A laser theodolite is provided which comprises a telescope (6), a focusing lens (10) and a reticle (12) provided in the telescope, a polarization beam splitter (13') provided on an optical axis (O) between the focusing lens and the reticle for reflecting a laser beam (S1) in a direction of collimation, and a laser-beam light source portion (16) for emitting the laser light toward the polarization beam splitter (13'). The laser-beam light source portion (16) and the reticle (12) are conjugate with respect to the polarization beam splitter (13').

Growing community of inventors

Itabashi-ku, Japan

Michiyo Saito