1、SMPTE RP*LLO 92 E3 8357403 OOOU364 573 E3 SMPTE RECOMMENDED PRACTICE RP 11 0-1 992 Revision of RP 11 0-1 988 Specifications for an Alignment Test Film for Anamorphic Attachments to 35-mm Motion-Picture Proiectors 1 Scope This practice specifies a test film for the alignment of anamorphic attachments
2、 or lenses for 35-mm motion- picture projectors. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this practice. At the time of publication, the editions indicated were valid. All standards are subject to revision, and
3、parties to agreements based on this practice are encouraged to investigate the possibility of applying the most recent edition of the standards indicated below. ANSVSMPTE 59-1 991 , Motion-Picture Film (35-mm) - Camera Aperture Image and Usage ANSVSMPTE 139-1 986 (R1991), Motion-Picture Film (35-mm)
4、 - Perforated KS 3 Test Pattern 3.1 A reproduction of the alignment chart is shown in figure 1. 3.2 A chart showing the dimensions as mea- sured on the test film is shown in figure 2. 3.3 The lettering shall be bold and of a style and size shown in the figures. Page 1 of 3 pages 3.4 The vertical lin
5、es shall be one-half as wide as the horizontal lines so that during projection they will appear to be the same width. 4 Test film 4.1 The test film shall be produced as a 35-mm print with white lines on a black background. 4.2 The test pattern shall be photographed and the center point positioned on
6、 the print as spec- ified by style B in ANSVSMPTE 59. 4.3 The print shall be on motion-picture stock made in accordance with long-pitch dimensions specified in ANSI/SMPTE 139. 4.4 The emulsion position of the print shall be away from the projector lens for direct front pro- jection. 4.5 The test fil
7、m shall be supplied in an emul- sion-in winding. 5 Densities 5.1 The black background shall have a neutral density greater than 1.9. 5.2 The density of the lines and lettering shall be below 0.3. NOTE - Test films made in accordance with this practice are available from the Society of Motion Picture
8、 and Television Engineers. Copyright O 1992 by the SOCIETY OF MOTION PICTURE AND TELEVISION ENGINEERS 595 W. Hartsdale Ave., White Plains, NY 10607 (91 4) 761 -1 1 O0 Approved November 6,1992 SMPTE RP*iLLO 92 O 8357401 00001b5 4OT ebi RP 110-1992 0.700 0.602 Figure 1 - Reproduction of test chart 4 0
9、.838 I 1 ANAMORPHIC FULL SCREEN (I 371 - 1.66 I .85 I I 1.75 I ANAMORPHIC PROJECTION t I t 7 i: FULL SCREEN ( 1.37) ! I ANAMORPHIC O 825 Figure 2 -Test chart dimensions Page 2 of 3 pages SMPTE RP*33O 92 El 8357403 OOOOLbb 346 RP 110-1992 Annex A (informative) Test pattern usage O The test pattern is
10、 used for checking: (a) The area being projected. The horizontal lines designate the projectable image area documented in ANSVSMPTE 195. permitting adjustment of the screen masking to the desired aspect ratio or judgment of how much image area is being lost outside the visible screen area. fb) The a
11、lignment of the anamorphic attachment or lens. Anamorphic attachments and lenses for theatrical use are designed to expand the film image by 2X; consequently, the four circles at the sides should appear perfectly round and Annex B (informative) Bibliography ANSI PH22.195-1984, Motion-Picture Film (3
12、5-mm) - Projectable Image Area - - Motion-Picture Prints the circle at the center should be an ellipse twice as wide as it is high. By rotating the attachment, the crossed lines can be made to appear perpendicular to each other. If both the vertical and horizontal lines do not appear sharp, the proj
13、ection distance scale must be adjusted. First use the focus knob so that the horizontal lines are very sharp. Then adjust the distance ring so that the vertical lines become as sharp as possible, and lock the distance ring. If the sharpness of the vertical lines changes when the distance ring is locked, repeat the sequence, starting with the focus knob. Page 3 of 3 pages
