公开(公告)号：US3644665A

公开(公告)日：1972-02-22

申请号：US3644665D

申请日：1969-03-11

Applicant: BELL TELEPHONE LABOR INC

Inventor： ENLOE LOUIS H ,  LARSEN ARTHUR B

IPC: H04N13/00 ,  H04N9/56

CPC classification number: H04N13/00

Abstract: This disclosure relates to a holographic flying-spot scanner wherein a stationary collimated beam illuminates the subject and is then optically relayed via a beamsplitter to a photodetector. A scanning spot is focused an appropriate distance in front of the beamsplitter such that the locus of the virtual image thereof lies in a plane which is in front of, at, or behind, the subject or subject plane, as desired. The detected interference between the rays of the scanning spot and the beam passing through the subject is used to reconstruct a hologram of the subject. The plane of the hologram is the locus of the virtual image of the scanning spot.

公开(公告)号：US3530233A

公开(公告)日：1970-09-22

申请号：US3530233D

申请日：1968-07-03

Applicant: BELL TELEPHONE LABOR INC

Inventor： CHAI SOO YOUNG ,  ENLOE LOUIS H ,  LARSEN ARTHUR B

IPC: H04N9/083 ,  H04N9/06

CPC classification number: H04N9/083

公开(公告)号：US3636249A

公开(公告)日：1972-01-18

申请号：US3636249D

申请日：1969-07-28

Applicant: BELL TELEPHONE LABOR INC

Inventor： LARSEN ARTHUR B

IPC: G03H1/00 ,  H04N9/56

CPC classification number: G03H1/00

Abstract: A hologram heterodyne scanner wherein a stationary coherent light beam illuminates the subject and is then optically relayed via a beamsplitter to a photodetector. The other phase-locked optical frequency, needed for the reference beam, is derived from the first-mentioned beam by means of a Doppler technique. The Doppler-shifted reference beam is orthogonally disposed with respect to the stationary beam and it is likewise relayed to the photodetector via the beamsplitter. The reference beam is focused to define a small spot and the latter is raster scanned with respect to the stationary beam. A random interlace scan is utilized, which helps to eliminate the scanning structure from the hologram. The photodetector is purposely placed at an out-offocus location with respect to the locus of the scanning beam waist.

Abstract translation: 全息外差扫描器，其中静止相干光束照射被摄体，然后经由分束器光学中继到光电检测器。 参考光束所需的另一个锁相光频率通过多普勒技术从首先提到的光束导出。 多普勒偏移参考光束相对于静止光束正交设置，并且同样通过分光器中继到光电探测器。 参考光束被聚焦以限定一个小斑点，并且后者相对于固定光束被光栅扫描。 利用随机的隔行扫描，这有助于消除全息图的扫描结构。 光电检测器有意地放置在相对于扫描光束腰部的轨迹的离焦位置。