1、 - SMPTE RP* 95 8357403 000Lb 228 SMPTE RECOMMENDED PRACTICE Dimensions of Double-Frame 35-mm 2x2 Slides for Precise Applications in Television RP 9-1 995 Revision of RP 9-1986 Introduction The use of 2x2 slides has increased enormously in many television stations. The handling of these slides is or
2、 will be by automatic or remote methods. Slides containing titles or geometric material must not tilt. In many sequences, slides bear related subject matter and it is necessary to lap-dissolve between them. Under these conditions, it is important that the material be accurately located on the film c
3、lip and that the film clip be accurately located in the mount. This is achieved in this practice by locating the picture information relative to the sprocket holes of the film clip and then using the sprocket holes to locate the clip in the mount. The dimensions and tolerances specified below are ba
4、sed on the fact that information on successive slides will register in a suitable tele- vision slide projector within the equivalent of f 5 television lines in a horizontal and vertical direction when the datum B and datum C edges of the mount are against the stops in the projector. Television scann
5、ed area has an aspect ratio of 4:3. The mask dimensions shown in figure 2 are suffi- ciently larger than those of the scanned area to permit convenient use. 1 Scope 1.1 This practce specifies dimensions and toler- ances for a double-frame 35-mm film clip and an associated 2x2-in mount which are inte
6、nded to ensure that picture information is accurately and consistently positioned in a suitable slide projector. 1.2 The slide mount described in clause 4 repre- sents one suitable method for attaining accurate and consistent positioning of picture information Page 1 of 4 pages in a suitable slide p
7、rojector. The use of alternate methods of mounting the film clip to within the same accuracy shall be considered as meeting the requirements of this practice. 1.3 This practice is not intended to replace or to void ANSVSMPTE 96 or ANSI PH3.43. 2 Normative reference The following standard contains pr
8、ovisions which, through reference in this text, constitute provisions of this practice. At the time of publication, the edition indi- cated was valid. All standards are subject to revision, and parties to agreements based on this practice are encouraged to investigate the possibility of applying the
9、 most recent edition of the standard indicated below. ANSVSMPTE 139-1986 (R1991), Motion-Picture Film (35-mm) - Perforated KS 3 Double-frame 35-mm film clip 3.1 The film for double-frame 35-mm film clips to be mounted and used in compliance with this practice shall be in accordance with ANWSMPTE 139
10、 and shall be of low-shrinkage safety film base. 3.2 The location of the image on the film and the length of the film clip shall be in accordance with figure 1 and table 1 (see note 10). 4 Slidemount 4.1 The mount for the double-frame 35-mm film clip shall be manufactured in accordance with figure 2
11、 and table 2. Copyright 8 1995 by the SOCIElY OF MOTION PICTURE AND TELEVISION ENGINEERS 595 W. Hartsdale Ave., White Plains, NY 10607 (914) 761-1100 Approved July 6, 1995 SMPTE RP* 95 m 8357403 0003997 3b4 m % i RP 9-1995 o0 o o o o o o 17- ;II -+- El _-_-i 4.2 Slide mounts produced in accordance w
12、ith this practice shall meet the dimensional tolerances of figure 2 and table 2 for at least one year following manufacture. 4.3 In the event that both halves of the mount are hinged together, the hinge shall be located along edge E. In the absence of a hinge, datum 6 shall be identified in an appro
13、priate manner on the external edge of the mount. Figure 1 - Location of image on film Table 1 - Image specifications I Dimensions Inches Millimeters Ai Width of camera image Bi Height of camera image ci Width of scanned image Di Height of scanned image EI Fi =GI Hi I) Ji = KI 1) 1.417 min 0.952 min
14、1.124 ref 0.843 ref 0.4995 f 0.0020 within 0.002 0.078 f 0.002 within 0.002 35.99 min 24.18 min 28.55 ref 21.41 ref 12.687 f 0.051 within 0.05 1.98 f 0.05 within 0.05 I Dimensions HI, JI, and KI are for images with no centerline designation. Page 2 of 4 pages SMPTE RP* 95 8357403 0003998 OTO RP 9-19
15、95 INDICATES COVER OLL mon I rw CDYLR GLASS LOCATION CLASS OATA) REAR SEGMENT FRONT REMOVED FRONT SEGMENT VlEW ) CAMERA MADE CLIP ( NOT SHOWN IN FRONT EMULSION DOWN FOR ORIGINAL EMULSION DOWN FOR OPTICAL PRINT FROM CAMERA NEGATIVE Figure 2 - Slide mount Table 2 - Mount specifications Dimensions Inch
16、es Mi I I imeters A2 1.984 f 0.004 50.39 f 0.10 B2 c2 02 E2 F2 G2 H2 12 J2 ) K2 L2 M2 N2 02 R2 R3 R4 TZ 1.984 f 0.3780 f 1.6060 f 0.5244 f 1.4496 f 0.8602 f 0.3681 f 0.5659 f 0.3831 f 0.0768 f 0.0656 f 0.1088 f 0.1000 f 0.0036 f 0.062 0.062 0.018 f 0.120 0.004 0.0020 0.0020 0.0020 0.0020 0.001 7 0.0
17、020 0.001 o 0.0025 0.0005 0.001 o 0.0005 0.0010 0.0020 max max 0.002 max 50.39 9.601 40.792 13.320 36.820 21.849 9.350 14.374 9.731 1.951 1.666 2.764 2.540 0.091 I .57 I .57 0.46 3.05 f 0.10 f 0.051 f 0.051 it 0.051 f 0.051 f 0.043 f 0.051 f 0.025 f 0.064 f 0.013 f 0.025 f 0.013 f 0.025 f 0.051 max
18、max f 0.05 max I 1) See note 5. I Page 3 of 4 pages SMPTE RP*9 95 m 8357403 O003999 T37 RP 91995 NOTES i The surfaces indicated by datum A shall be plane within 0.002 in (0.05 mm). 2 The edges indicated by datums B and C and edge D shall be straight within 0.002 in (0.05 mm). 3 Datums B and C and ed
19、ge D shall be perpendicular to datum plane A within 1 O. 4 Datum C and edge D shall be perpendicular to datum B within 0.002 in (0.05 mm). 5 Pins 2 and 7 must not depart from dimension J2 by more than 0.0020 in (0.051 mm) with respect to each other. 6 The pins must maintain their indicated dimension
20、s at least 0.010 in (0.25 mm) beyond the emulsion position. 7 The pins should extend through the film clip but must not project beyond either exterior surface of the slide mount. 8 Cover glass should be buiR into the mount on each side of the film surface. This glass should be nominally 0.030 in (0.
21、76 mm) thick and should be treated to reduce Newtons rings where film contacts the glass. When the mount is assembled, there should be sufficient space between the cover glasses to accommodate a film thickness of 0.006 in (0.15 mm) in a snug manner. 9 Material shrinkage and other practical considera
22、tions should be taken into account when choosing dimensions and tolerances for manufacturing purposes. The dimen- sions and tolerances in table 2 provide a guide for the final product. 10 The recommended emulsion position is that of an original reversal camera film. 11 Slide mounts manufactured in a
23、ccordance with the reference edges specified as datums B and C will have minimum position variations among different mounts when these edges are against the projector stops. When edges D and E are against the projector stops, slightly poorer positioning accuracy results due to the added dimensional tolerances of A2 and 82. Annex A (informative) Bibliography ANSI PH3.43-1977 (R1991), Dimensions for Projector Slides ANSI/SMPTE 96-1992, Television - 35- and 16-mm Motion-Picture Film and 2x2-in Slides - Scanned Area and Photographic Image Area for 4:3 Aspect Ratio Page 4 of4 pages
