ANSI AIIM MS26-1990 35 mm Planetary Cameras (Top-Light) - Procedures for Determining Illumination Uniformity of Microfilming Engineering Drawings (Includes Errata and Amendment 1 1.pdf

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1、ANSIIAIIM MS26-Al-1998 -AMENDMENT 1 OF ANSIIAIIM MS26-1990 American National Standard for Information and Image Management -Amendment 1 of ANSI/AIIM MS26-1990 -ANSI/AIIM MS26-Al-1998 Approved as an amendment to an American National Standard: March 31, 1999 Function Name of Organization Represented R

2、epresentative This amendment ANSl/AlIM MS26-A1-19981 Marilyn Wright, Association for Information amends ANSI/AIIM MS26-1990 35 mm Plane- Chair and Image Management tary Cameras (top-light) - Procedures for De- termining Illumination Uniformity of Microfilming Engineering Drawings. Most of this amend

3、- ments changes update information. Also, this amendment changes 4.1.1 by changing “O. 79 inch” to “0.079 inch” and by making the text more consistent with ANSI/AIIM MS24-1996, 4.1. See ANSMAIIM MS26-1990 for information James Meyer Saros Corporation not affected by this amendment, Roy Pierce Xerox

4、Corporation International Bell Item Nos. X-216 and X-224. Paper targets gMog rise to curl should be mounted to a curl resistant surface. The dimension values recorded in Table 2 are based on the following formula, and incorporate the tolerance given: For all reductions (161, 24:1, 30:1), Where “q is

5、 both the horizontal and vertical dimensions of the square Where “R” is the reduction, Element 2 chart, and 5mm x R%6.25mm x R or 0.197 inch x R E2 0.246 inch x R (tolerance: 15 mm O.U, inch). Table 1. Test Target Dimensions for Element 1 Application Roll film* Unitized record carrier (aperture card

6、t) identifier Dimension Reduction x* 44.45 mm (1.750 inches) + 1.5 mm (0.06 inch) - O mm Reduction x 31.75 mm (1.20 inches) + 1.5 mm (0.06 inch) - O mm Reduction x 41.02 mm (1.615 inches) -I- 1.5 mm (0.06 inch) - O mm Reduction x 30.40 mm (1.197 inches) + 1.5 mm (0.06 inch) - O mm * Based on frame s

7、ize as specified in ANSI/AIM MS32-1987 t Based on image area for D-size apertureas specified in ANSI/AIiM MS41-1990. * in this column, x represents muitipiication Table 2. Test Target Dimensions for Element 2 Reduction 1:16 1:24 1:30 Dimension* Minimum Maximum 75 mm (2.95 inches) 115 mm (4.52 inches

8、) 145 mm (5.71 inches) 105 mm (4.13 inches) 155 mm (6.10 inches) 192.5 mm (7.58 inches) * The values recorded incorporate the tolerance from the formula in footnote no. 5 to determine 3 They shall be placed on Element 1 in accordance with Figure 1 and Table 3. A minimum 4.0 mm (0.16 inch) wide black

9、, opaque, nonreflective, matte-finish border6 should be placed on Element 1 at the outside periphery of each Element 2, thereby surrounding each Element 2.7 Each Element 2 shall be sequentially numbered in ac- cordance with Figure 1. The numera?) :4 Element placement should conform to Figure 1 5 Pro

10、cedure for Use 5.1 Preparation 5.1.1 Test Target. The standard test target for illumin- ation uniformity is prepared for the reduction ratio to be employed in accordance with Section 4.8 The target is to be placed “face up” on the copyboard of the camera and oriented according to the manufacturers c

11、amera recommendations. Each Element 2, as specified in 4.1.2, shall be provided with the appropriate sequential numeral(s) measuring a minimum of 50 mm (approximately 2 inches) high and showing the reduction ratio. Element 4 of the test target sha be provided with letters and numerals conforming to

12、4.1.4, showing date and camera identification. May be mork tape, or may be drawn with a high density, black opaque, nongiossy marker. This will help densitometer operators locate the microimages of Element 2 on subsequent microfh frames. Element 2s can be incorporated as part of Element 1, by the us

13、e of peripheral borders (outlines), if the object (test) areas of Element 1 designated as Element 2s conform to the reflectance percentage tolerances given in 4.1.2. 2 AIIM MS2b 90 W 2595532 00b7bb 3 W 5.1.2 Camera. The 35 mm planetary camera to be tested is set to the appropriate focus and reductio

14、n ratio by following the manufacturers recommended procedures. The illumination of the room is to be adjusted in accor- dance with the recommendations of camera manufacturers and standard operating procedures dictated by the users facility. Room lighting should be subdued and should not give rise to

15、 reflections from, or hot spots on, the test target. The camera is to be loaded with film normally used. 5.2 Test Frame Exposure. The level of illumination is to be set in accordance with camera manufacturers recom- mendations. An exposure series is made, incrementally pro- gressing from under- to o

16、verexposure. The film strip is pro- cessed in the che the recommendation of the camera manufacturer should be followed. The opti- cal density values of any two adjacent images of Element 2s of the test frame cannot differ by more than O. 10 density units and, to assure uniformity of illurnination, a

17、n adjust- ment of the camera lights is also required. Since it may not be possible to alter the illumination distribution without af- fecting the illumination of the center Element 2 of the test target, a new exposure series will have to be obtained after the adjustments to the camera lights have be

18、en completed. The procedure, as specified in 5.1.1 and 5.1.2, is repeated until the optical visual density of the microfilm images of Element 2s of the test target for illumination uniformity conform to the uniform density requirements of the previous paragraph. Element 1 7 Figure 1. Test Target for

19、 Determining Illumination Uniformity of 35 mm Planetary Camera Copyboards 3 AIIM MS2b 90 m 2575512 OCIL8767 5 m Appendix A. Illumination Uniformity Optical Density Readings Test Chart (This appendix is not part of the American National Standard for Information and Image Management-35 mm Planetary Ca

20、meras (top-light)-Procedures for Determining Illumination Uniformity of Microfilming Engineering Drawings, ANSI/ AIIM MS26- 1990) CAMERA DATE TIME 2 .-i- I l I I I I I I I 41 2 2 El - I I I I I I I I 31 L i TOP LIGHT ADJUSTMENTS (SETTINGS) AIIM MS26 30 2575532 0068768 7 ANSllAiiM MS26-1993 by Asstxiation for Infomation atxi imge BYSrimglement i100 Wayne Avenue, Suite 1100 Silver Spring, NIB 2910 Tel: 301 1587-8202 Fax: 301 1587-271 1 ISBN 0-8925f3-187-5 Printed in the United States of America c , - .,