This standard specifies the test targets used to check the performance of flat-bed microfilm camera systems. This standard applies to photographic systems that produce first-generation microfilms in accordance with ISO 3272-1, GB/T 8989, GB/T 6161 or ISO 446. This standard does not apply to prints or hard copies. GB/T 17293-1998 Microfilming technology Test targets for checking the performance of flat-bed microfilm camera systems GB/T17293-1998 Standard download decompression password: www.bzxz.net
This standard specifies the test targets used to check the performance of flat-bed microfilm camera systems. This standard applies to photographic systems that produce first-generation microfilms in accordance with ISO 3272-1, GB/T 8989, GB/T 6161 or ISO 446. This standard does not apply to prints or hard copies.

GB/T17293-1998
This standard is formulated based on IS01055:1994 "Microfilm Technology Plate". In terms of technical content, it is equivalent to the international standard. The test specimen standard for checking the performance of platform microfilm camera systems adds "array center" to the test chart placement position in 3.2.1 and 3.3.1 on the basis of IS010550 to make the test chart placement position more accurate.
Appendix A of this standard is a prompt appendix:
This standard is proposed by the National Microfilm Technology Standardization Technical Committee. This standard is issued by China Institute of Standardization and Information Classification and Coding. The main drafters of this standard are Liu Taping, Zeng Jinxing, Ren Qingling, Xiao Wei and Sun Jingrong. GB/T17293-1998
ISO Foreword
ISU International Organization for Standardization (ISO) is a global federation of international standardization organizations (ISO member organizations). The drafting of international standards is generally done by ISO technical committees. Any member organization that is interested in a certain established research project of the technical committee has the right to participate in the work of the committee. International organizations that have liaison with ISO, and government and non-governmental organizations also participate in this work. ISO has a close cooperative relationship with the International Electrotechnical Commission (IEC) in all aspects of standardization related to electrotechnical technology. The draft international standards formally adopted by the technical committee are circulated among the member organizations for voting: the publication of an international standard requires at least 75% of the member organizations to vote in favor. International Standard ISO 10550 was drafted by Technical Committee C171 of ISO. JS()/TC171 is responsible for the development of international standards for microfilm and optical storage for the recording, preservation and use of documents and images. Appendix A of this international standard is for information only: Scope
National Standard of the People's Republic of China
Micrographic Technology
Test Target for Checking System Performance of Platform Microfilm Cameras
Micrographics Plnnelary camer?systcms T'est targer far checking performaneeGB/T 17293—1998
eq1s0 10550:1994
This standard specifies the test target for checking the system performance of platform microfilm cameras. And it determines the method of checking the performance of microfilm photography system and microfilm camera in routine application by using the first generation microfilm of test standard: This standard applies to the photography system of the first generation microfilm produced in accordance with the provisions of TS03272-1, CB/T8989, (B/T6163 or [SC) 44G.
This standard does not apply to photocopies or hard copies. 2 Reference standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid, all standards will be revised, and the parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T616194 Characteristics of test chart No. 2 in microfilm technology and its application in microfilm technology GB751787 Microfilm technology: Provisions for photographing the quality of microfilm on 16mm roll film GB8988-8% Microfilm technology inspection technical drawings Microfilm quality test plate preparation GB/T8989-1998 Microfilm technology technical drawings and technical documents Quality standards and inspection of microfilm CB899088 Microfilm technology Inspection technical drawings Microfilm quality test plate\Reflectivity gray card GB11500-89 Geometric conditions for photographic transmission density measurement GB11501-89 Optical conditions for photographic density measurement GB/T12356-90 Microfilm technology Characteristics of test plate for 16mm platform microfilm camera and its application Geometric conditions for photographic reflection density measurement GB/T 1282-291 Microfilm technology: ·-1SO characters and IS0 Test chart No. 1 - Characteristics and application IS0 116:1991 Paper, paperboard and pulp - Measurement of apparent reflectance IS0 2469:1977 IS0 3272-1:1983 Microfilming of technical drawings and other drawing room documents - Part: Procedures Microfilming - Procedures for photographing documents on 16 mm and 35 mm silver-bright bite type microfilm IS0 6191:1991 130 9923:1994 3 Characteristics of test charts 3.1 General Microfilming A6 Transparent microfilm image arrangement
GB/T17293—1998
The test target plate should be suitable for the microfilm method adopted. The composition and arrangement characteristics of the target plate are shown in Figure 1. Its size should be consistent with the maximum size of the document that can be photographed by the microfilm system under a given reduction ratio. ISO No. 1 test chart should meet the requirements of ISO 446 + No. 2 test chart should meet the requirements of (H/T 6161. Density source composition area
National Administration of Standards and Regulations [CSI
3.2 Test target plate using reflected light
Reduction ratio scale
Figure position table 2 Town 105
The test target plate should use an opaque substrate with a maximum reflection density of 0.12 (i.e. a minimum reflectivity of 75%). The target plate is composed of the following parts;
3.2. 1 Test Chart
5 No. 1 or No. 2 test charts. The array center of one of the test charts is at the center of the test target plate, and the other four are on each half diagonal of the substrate. The distance between their array centers and the four corner points of the target plate should be 10% of the diagonal length. 3.2.2 Shrinkage
The shrinkage card is used to indicate the shrinkage used when photographing the twist test target plate. 3.2.3 Flip Test Area
Choose at least two of the following three density test areas. The image area formed by each density test area on the microfilm should be no less than 12mmX2mm
One is a spectrally neutral matte gray area with a reflection density between 0.33 and 0.28 (i.e., a reflectivity between 17% and 53%). It is suitable for use when photographing technical drawings.
The first is a spectrally neutral matte area with a reflection density between 1.25 and 1.19 (i.e., a reflectivity between 5% and 6.4%). It is suitable for all situations.
The second is a spectrally neutral matte area with a reflection density between 0.10 and 1.07 (i.e., a reflectivity between 8% and 85%). It is suitable for use when photographing originals.
3.2.4 Reduction scale
The reduction scale is a metric scale. The length of the scale should be adapted to the size of the measuring plate, and its length, width and contrast should facilitate the measurement of its image length.
3.2.5 Grid lines
If you want to check optical distortion, you can add grid lines on the test plate. The measurement of reflection density is carried out according to the requirements of GR/112822 and (B11500, and the reflection The measurement of the transmission rate shall be in accordance with the provisions of ISO 2469. 3.3 Test target using transmitted light. GB/T 17293-1998. The test target shall be made on a spectrally neutral substrate with a maximum transmission density of 0.12 (i.e. a minimum transmission of 75%). It consists of the following parts: 3.3.1 Transparent test chart 5 transparent test charts No. 1 or No. 2. The center of one transparent test chart is at the center of the test target. 1 on each half diagonal of the test target, and the distance between the center of their array and the four corner points of the target plate should be 10% of the diagonal length. 3.3.2 Transparent reduction rate card
The transparent reduction rate card is used to indicate the reduction rate used when photographing the test target plate. 3.3.3 Density test area
Choose at least two from each density test area, and the shadow area formed by each density test area on the microfilm shall not be less than 2mmX2mm
·One is a light-neutral gray area, and its transmission density The transmittance is between 0.33 and 0.28 (i.e., the transmittance is between 47% and 53%). It is suitable for use when expanding technical patterns.
One is a spectrally neutral transparent area with a transmittance between 0.10 and 0.07 (i.e., the transmittance is between 80% and 85%). It is suitable for use when photographing originals.
One is a spectrally neutral black area with a transmittance density between 1.25 and 1.19 (i.e., the transmittance is between 5.6% and -6.4%), which is suitable for all situations.
3. 3.4 Reduction scale
The reduction scale is a metric scale. The length of the scale should be adapted to the size of the test standard, and its length, width and contrast should be convenient for measuring the length of its image.
3.3.5 Grid
If distortion needs to be checked, grid lines can be added to the target plate. Transmission density measurements should be made in accordance with G311500 and G11501. 4 Use of test targets
4.1 Photographing test targets
4.1.1 Measurement of microfilm system performance
According to the relevant international standards and national standards, the test targets are photographed using the available magnifications to control the gray area image density to 1.0 ± 0.1.
4.1.2 Monitoring of microfilm cameras in routine applications According to the relevant international standards and national standards, the test targets are photographed in the specified range at the magnifications used to photograph the documents. The amount of noise does not have to be the same as that of the document. The gray area image density should be controlled to 1.0 ± 0.1. Appendix VIII gives examples of several originals photographed using transmission or reflected light. 4.2 Measurement
4.2.1 Density measurement
Use a densitometer to measure the density of the microfilm images in the gray and black areas of the standard plate, and select the frame with the gray area image density of 1.0±0 as the resolution measurement frame; measure the density of the darkest area image to check the minimum density of the microfilm. 4.2.2 Clarity (resolution) measurement
Read the test chart with the resolution at the center and four corners according to GB/T 6161 or ISC 445. A1
Originals photographed with reflected light, for example:
GB/T 17293-1998
Appendix A
(Suggestive Appendix)
Examples of originals
All texts and drawings that can be read with reflected light Originals photographed with transmitted light, for example: bzxZ.net
a) In medical or geological books, explanatory texts printed on transparent or translucent film bases together with the underlying text or captured images b) Projection envelopes for projectors
c) Pictures on transparent or translucent film bases to be read with transmitted light; d) X-ray films used for medical diagnosis and exposed and developed
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