1、STD.SMPTE RP 316-ENGL 2000 H 8357403 0004L78 727 I SMPTE RECOMMENDED PRACTICE RP 116-2000 Revision of RP 116-1995 Dimensions of Photographic Control and Data Record n-35-mm Mot ion-Pictu re Camera Negatives 1 Scope Pagel of 2 pages 2 Data record This practice specifies the lateral location and dimen
2、 sions of a photographic control and data record on 35-mm motion-picture camera negatives, the width scanned by the control and data recorder and reproducer, the camera aperture, and the reproducer spectral sensitivity. 2.1 The dimensions and lateral location of the control and data record shall be
3、 as specified in the figure and table. 2.2 The recording and reproducing slit images shall be positioned at an angle of 90“ k 1 O to the reference edge of the film SCANNE O Figure 1 - Control and data record location Table 1 - Specifications Dimensions Inches Millimeters A 0.191 f 0.001 4.85 f 0.03
4、B 0.21 1 f 0.001 5.36 f 0.03 C 0.201 IO.001 5.1 1 f 0.03 D 0.189 ref 4.80 ref F 0.005 f 0.001 0.13 f 0.03 Copyright O 2000 by the SOCIETY OF MOTION PICTURE AND TELEVISION ENGINEERS 595 W. Hartsdale Ave., White Plains, NY 10607 (914) 761-1 100 Approved May 30,2000 STD-SMPTE RP ffb-ENGL 2000 II 835740
5、1 0004179 bb3 I RP 1 16-2000 3 Camera aperture 4 Reproducer spectral sensitivity Cameras intended for recording a control and data record must have a modified aperture which positions the picture edge next to the sound record area at 0.214 in (5.44 mm) minimum from the reference edge of the film. Th
6、is is dimension Das specified in SMPTE 59. The peak or maximum response of the combination of the control and data track reproducer, light source, filter, and receptor shall be at 550 nm + 130 nm - O nm. The integrated response of this combination to all wavelengths greater than 800 nm shall be less
7、 than 5% of the total integrated response measured from 400 nm to 800 nm. Annex A (informative) Spectral response The spectral response specified in clause 4 is intended to ensure that the control and data track will be adequately reproduced whether the track image is formed of dyes, silver, or dyes
8、 and silver. Restriction of the infrared re- sponse is necessary because the dyes used in conventional color motion-picture films do not absorb infrared light effec- tively. Since dirt and scratches on the film will absorb infrared light, restriction of the infrared response will improve the signal-to-noise ratio of the system. Annex B (informative) Bibi iog raphy SMPTE 59-1998, Motion-Picture Film (35-mm) - Camera Aperture Images and Usage Page 2 of 2 pages
