|국가/구분||United States(US) Patent 등록|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 6 인용 특허 : 2|
Apparatus for encoding a laser beam with information indicative of position in the beam. A linearly polarized laser beam passes through a birefringent wedge which encodes a continuously varying polarization across one dimension thereof. The polarization-encoded laser beam is applied to an electro-optic modulator which induces a second harmonic component of an applied modulation signal to appear in the beam due to optical biasing by the polarization encoding. On beam center, only the fundamental appears, while going away from beam center the second harmon...
An apparatus for spatially encoding a laser beam such that modulation components at a second harmonic of a predetermined frequency are indicative of position across at least one dimension of said beam, said apparatus comprising: polarization encoding means for providing a laser beam encoded such that the polarization varies across at least one dimension of said beam; a modulation source for providing a modulating signal at said predetermined frequency; and an electro-optic modulator, responsive to said modulating signal and disposed to receive the encode...