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1、612.843.6617.75-71.681.3 UDC JIS JAPANESE I NDUSTRJAL STANDARD Computer - aided perimeters -; I standard i n Japanese is to be evidence ; - - I Transiation without guarantee I I I In the event of any doubt arishg, the original I k _-_- J Translated Japanese Standards Association 1-24, Akasaka 4, Min
2、atc-ku Tokyo 107 Japan 0 JSA, 1992 PROTECTED BY COPYRIGHT Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/07/2007 23:10:01 MSTNo reproduction or networking permitted without license from IHS -,-,-
3、UDC 612.843.6:617.75-71:681.3 JAPANESE INDUSTRIAL STANDARD J I S Computer-aided perimeters T 1206-1992 1. Scope This Japanese Industrial Standard specifies the computer-aided perimeters (briefly “perimeters“) the computer-aided instrument to measure the field of vision of examinees by means of the i
4、ndex mark shown on the background. The applicable standards to this Standard are as follows. JIS T 1001- General Requirements for Safety of Medical Electrical Equip- JIS T 1002-General Rules for Safety Testing Procedures of Medical Electri- JIS T 1005-Style Manual for Instruction Manuals JIS T 1011-
5、Glossary of Terms Used in Medical Electrical Equipment JIS 2 8120-Glossary of Optical Terms Remarks: ment cal Equipment (General Terms) 2. Definitions definitions are given in the clause “Definitions“ of JIS T 1011 and JI.“ 2 8120. For the purpose of this Standard, the following definitions apply. O
6、ther terms and (1) (2) (3) (4) (5) index mark A stimulus at the measuring point used for examination of field of vision. luminance of index mark Difference between the absolute luminance of index mark and the luminance of adjacent background. luminance of background Luminance of the background where
7、 the index mark is presented. specified value Value specified by manufacturers in their specifications of products. fixed viewpoint The point which the examinee stares at, being the origin of coor- dinates of field of vision. 3. Safety The matters related to safety shall be specified by JIS T 1001,
8、4. (Classification of equipment) to 13. (Abnormal operations and fault condition). However, protection class against electric shock shall be class I equipment. and protection type against electric shock shall be type B equipment. 4. Performance When perimeters are tested according to 6.3, their perf
9、ormance shall meet the follow- (1) ing requirements. Luminance of index mark The luminance of index mark shall be in the range within f 20 % of the specified value (unit: cd/m2). (2) Luminance of background The luminance of background shall be in the range within f 20 % of the specified value (unit:
10、 cd/m2). PROTECTED BY COPYRIGHT Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/07/2007 23:10:01 MSTNo reproduction or networking permitted without license from IHS -,-,- 2 T 1206-1992 (3) Position
11、 of index mark The position of index mark within 30 degrees from the center shall be in the range of i : 1 degree against the specified value. The posi- tion of index mark outside 30 degrees from the center shall be in the range of rt 2 degree against the specified value. Size of index mark The size
12、 of index mark, when converted into the solid angle, shall be in the range within f 20 % against the specified value. (4) (5) Showing duration of index mark The showing duration of index mark shall be in the range within f 10 % against the specified value. 5. Composition and structure 5.1 ments. Com
13、position Perimeters shall be composed of at least the following functional ele- (1) (2) (3) Function of controlling the luminance of background Function of controlling the index mark Function of confirming that the index mark is being stared at by the examinee 5.2 Structure In addition to JIS T 1001
14、, 14. (Structure), the structure shall be specified by the following requirements. (1) (2) (3) (4) The structure of each part shall be made of materials of good quality, assembled carefully, and rigid. The moving parts shall operate smoothly and reliably. The optical system shall be frec from such a
15、bcrration that impairs practical use, harmful internal reflection, and stray light. The parts of optical system shall be free from haze, fungus, crack, silver deposits, and free from such harmful bubble, striae, bruise, grain marks, bum, and dirt that impair practical use. “The reflection preventive
16、 film shall be free from bruise, and uneven tone. The lamps as the light source etc. shall be turned on and off reliably, (5) 6. Test - 6.1 Test conditions The test conditions shall be specified as follows. Perimeters that are not energized shall be exposed sequentially to the following environmenta
17、l conditions, and tested under the conditions specified by JIS T 1002, 4. (Test conditions). Ambient temperature At - 10 It 3C for 16 h. (1) (a) (b) Ambient tempcrature At 55 f 2C for 16 h. (2) (3) Precision of the luminance mctcr used for test shall be k 4 %. The luminancc shall be tcstcd in the da
18、rk room where thc influence on the luminance o background is 10 % or less. 6.2 Saety test The safety tcst shall be specified by JIS T 1002. However, since perimeters are optical instruments, they shall not bc subjected to JIS T 1002, 14. (Mechani- cal strength), (i) Shock test. PROTECTED BY COPYRIGH
19、T Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/07/2007 23:10:01 MSTNo reproduction or networking permitted without license from IHS -,-,- 3. T 1206-1992 6.3 Performance test The performance test
20、 shall be specified as follows. Measure the luminance of index mark at an arbitrary position of each quadrant using a luminance meter, and obtain the difference between the measured values and the specified values. Measure the luminance of background at an arbitrary position of each quadrant using a
21、 luminance meter, and obtain the difference between the measured values and the specified values. Measure the position of index mark of each quadrant in the range within 30 degrees from the center, and outside; obtain the difference between the measured values and the specified values. Measure the a
22、rea of index mark at an arbitrary position of each quadrant; con- vert it to the solid angle, and obtain the difference between the measured values and the specified values. This shall be specified as the size of index mark. Measure the showing duration of index mark at an arbitrary position of each
23、 quadrant; obtain the difference bctween the measured values and the specified values. (1) (2) (3) (4) (5) 7. Marking Perimeters shall be marked on the external part of main assembly easy to be seen, (1) (2) (3) (4) (5) (6) using nameplates etc. with the following information. Name and location of m
24、anufacturer Name, modcl, and manufacturing number of product Rated power supply frequency (Hz) and rated power supply voltage (V) Power supply input (A, VA, or W (for power factor of 90 % or more) Class and type of protection against clectric shock Rating of fuse (to be clearly indicated on or near
25、fuse holders.) 8. Environmental condi ti ons The environmental conditions shall be spccified by JIS T 1001, 3.1 (Environmental conditions). 9. Accompanying documcnts Perimeters shall be provided with the instructions manual specified by JIS T 1005. PROTECTED BY COPYRIGHT Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/07/2007 23:10:01 MSTNo reproduction or networking permitted without license from IHS -,-,-