公开(公告)号：US3829222A

公开(公告)日：1974-08-13

申请号：US34464473

申请日：1973-03-26

Applicant: SAAB SCANIA AB

Inventor： ASLUND N

IPC: G01D5/34 ,  G01J3/40 ,  G01N21/22

CPC classification number: G01J3/40 ,  G01D5/341

Abstract: Density variation across a localized area of a photographic plate is detected by directing a beam through said area and thence onto a photoelectric detector through a narrow slot at the imaging plane. Relative motion is effected between the beam and the slot, hence detector output varies with density across the scanned zone. A fiducial mark carrier is in a separate beam (preferably emanating from the same source) which follows a path in bypass relation to the plate but which is combined with the image carrying beam at the slot. Light filters in the respective beams enable separate electronic processing of image beam signals and fiducial mark beam signals.

公开(公告)号：US3809482A

公开(公告)日：1974-05-07

申请号：US34741773

申请日：1973-04-03

Applicant: SAAB SCANIA AB

Inventor： ASLUND N ,  PETTERSSON S ,  ANGELSTRAND S

IPC: G01J3/28 ,  G01J3/40 ,  G01N21/59 ,  G01N21/06 ,  G01N21/22

CPC classification number: G01J3/40 ,  G01J2003/2866 ,  G01N21/5911

Abstract: An image beam from a constant intensity light source is passed through a small area of an image on a photographic plate, thence through a variable width scanning slot and onto a photoelectric detector. Relative scanning motion between beam and slot is effected in directions transverse to slot length. A second beam from the same source is directed around the plate, through the slot and onto the detector. The beams fall on the detector alternately, in synchronism with scanning, so that the second beam produces calibration pulses. Detector output is so amplified as to maintain amplified calibration pulses at constant magnitude.

Abstract translation: 来自恒定强度光源的图像光束通过照相板上的图像的小区域，然后通过可变宽度的扫描槽并到达光电检测器。 光束和狭缝之间的相对扫描运动在横向于槽长度的方向上进行。 来自相同源的第二个光束被引导在板周围，穿过槽并且到达检测器。 光束与扫描同步地交替地落在检测器上，使得第二光束产生校准脉冲。 检测器输出被放大，以将放大的校准脉冲保持在恒定幅度。

公开(公告)号：SE342506B

公开(公告)日：1972-02-07

申请号：SE1311466

申请日：1966-09-29

Applicant: SAAB SCANIA AB

Inventor： ASLUND N

IPC: G01J3/06 ,  G01J3/40 ,  H04N3/09 ,  G01J3/08

公开(公告)号：SE355414B

公开(公告)日：1973-04-16

申请号：SE433572

申请日：1972-04-05

Applicant: SAAB SCANIA AB

Inventor： ASLUND N ,  PETTERSSON S ,  ANGELSTRAND S

IPC: G01J3/28 ,  G01J3/40 ,  G01N21/59 ,  G01J1/16 ,  G03C5/02

公开(公告)号：SE354360B

公开(公告)日：1973-03-05

申请号：SE391772

申请日：1972-03-27

Applicant: SAAB SCANIA AB

Inventor： ASLUND N

IPC: G01D5/34 ,  G01J3/40 ,  G01B11/00 ,  G03C5/02

Abstract: 1429536 Examining photographic plates &c SAAB-SCANIA AB 27 March 1973 [27 March 1972] 14693/73 Heading G1A In a device for investigating photographic plates 2 and the like radiation M passing through the plate is split into three beams by Abbe-cubes 16, one beam going to a projector screen 20, the other two being directed to separate detector systems where the images of the detector plate formed at a slot aperture 4 in front of each detector system are scanned by means of vibrating prisms 22x, 22y in two perpendicular directions. An image of a reference grid or pattern, to enable determination of the co-ordinate position of the instantaneous portion of the image being scanned, is also superimposed in each of the image planes of the photographic plate at the slots 4, by means of a reference beam R passing through a measuring index disc 32 and a focusing lens 31 co-operating with the Abbe-cubes 16 as shown. The reference beam R and the measuring beam M are distinguishable from one another by inserting a filter 33 (blue) in the measuring path M and constructing the measuring index disc to pass only say, red light, the detectors (a photo-multiplier 21 x and a photo-diode 34x) being chosen or arranged to be sensitive to the corresponding wavelength. Thus the output of one detector (the photo-multiplier) indicates the transmitivity of the portion being scanned while the output of the other detector indicates its relative position. The photographic plate 2 is attached to a holder 6 which is movable in two co-ordinate directions by a system of rollers and rails 7 and 8 to enable different portions of the plate to be investigated. A rotating chopper 28 in the beam periodically interrupts the measuring beam and periodically allows radiation reflected from a mirror 27 to pass via light fibres 25, 26 and an aperture 24 in the chopper, into the measuring beam path and thereby causes "reference pulse" to be formed by the detector at the beginning of each scan. The description discloses several forms of the measuring index disc may take Figs.2, 3, 4 (not shown), that is, half transparent to red light, one quarter transparent or comprising one quarter transparent together with a series of diagonally arranged smaller transparent squares.