This standard specifies the parameter series, technical requirements, test methods, marking, packaging, transportation and storage of portrait lenses. This standard applies to photographic lenses for tabletop cameras and portable cameras. JB/T 10070-2002 Portrait Lens JB/T10070-2002 Standard download decompression password: www.bzxz.net

[C37.040.[0
Machinery Industry Standard of the People's Republic of China
TB/T10070—2002
Replacement of JR/T10070—1899
Portrait Lens
Portrait Icnses
2002-07-16 Issued
2002-12-01 Implementation
The State Economic and Trade Commission of the People's Republic of China Issued Before Sound
Normative Reference Documents
Technical Requirements
Average Coefficient,
Resolution
Color Contribution Index
Transfer Performance
Test Method
Average Coefficient,
Resolution
Stray Light Coefficient,
Color Contribution Index
Operation Performance,
Packaging, Transportation and Storage
Figure 1 Resolution Test Chart,
Table 1 Limit Deviation of F Number, Ratio of Limit Deviation of F Number to Nominal Value of F NumberTable 2 Resolution Distribution
Table 3 Resolution and Line Size
Table 4 Reading Value and Calculated Value Recording Example of Lens Resolution m/T 100702002
This standard is a revision of B/T100701999±3. Compared with B/T10070-1999, the main changes are as follows: the test methods of stray light coefficient, color contribution index and appearance are added. The resolution range specification is added.
This standard is proposed by China Machinery Industry Federation and is under the jurisdiction of National Photographic Machinery Standardization Technical Committee. The main drafter of this standard is Hangzhou Yuanji Machinery Research Institute. The main author of this standard is Kong Qingyuan:
JB/T10070-2002
1 Scope
Portrait lens
JB/T100702002
This standard specifies the parameter series, technical requirements, test methods, marking, packaging, transportation and storage of portrait lenses. This standard applies to the display lens for 3D cameras and portable 3D cameras. 2 Normative references
The clauses in the following documents become the clauses of technical standards through the application of this standard. For any referenced document with a date, all subsequent amendments (excluding errata) or revisions are not applicable to this standard. However, all parties that cannot reach an agreement based on this standard are encouraged to study whether the latest versions of these documents can be used. For any undated referenced document, the latest version is applicable to this standard. JB/T8248.2 Measurement method of camera head, effective aperture and relative aperture JB/T8248.3 Measurement method of camera head gradient coefficient and image plane variation JB/T2AB.4 Measurement method of camera lens stray light coefficient JB/TB24R.5
JB/T8250.7
Rejection coating head:
Collection measurement method
Bottle root machinery
Packaging, transportation, storage conditions and test lamp method JB/T8251 Technical requirements for the color contribution index of photographic lenses 3
3.1 Focal length
The absolute value of the difference between the measured focal length and the nominal focal length shall not exceed 5% of the nominal focal length, that is: -
x100%$5%
3.2.1The percentage of the limit deviation of F number and the ratio of the limit deviation of F number to the nominal value of T number shall comply with the requirements of the test[3.2.2The standard series of H-number scale values ​​are: 2.8, 4, 5.6, 8, 1I, 16, 22, 32, 45. The minimum F number of the lens is allowed to be different from the numbers in the standard series, but subsequent values ​​should be selected from this series. 3.3 Gradient coefficient
When the aperture is fully open, the gradient coefficient at 80% of the full field of view of the lens is above 40%. Table 1 Limit deviation of F number, ratio of F number limit deviation to the nominal value of F number
Optical image opening
5.61 yuan
8 and above
The difference in energy absorption E of the whole F number
The difference in energy absorption efficiency of the whole F number
—11%
JB/T 10070—2002
3.4 ​​Resolution
The resolution requirements of various broadcast points meet the requirements of Table 2. The resolution of any field of view and any area shall not be lower than the resolution pattern's low-dimensional number Table 2 Resolution Army
Flat film width mn
:27×102
:65x120
:78×127
216x16s
254×2G3
305×254
3.5 Stray light
The stray light coefficient shall not be greater than 4%
Stray light coefficient G
Freedom index
"Stray light intensity on the image surface,
Total exposure on the image surface
Central field of view
Amount of square bar mm
Outside the center
The standard value and deviation of the color density index shall comply with the requirements of the color index in JB/T8251. 3.7
Operational performance
The optical adjustment ring should rotate smoothly and there should be no jamming or unevenness. 3.8 Appearance
The optical components should be kept clean and there should be no mold spots. In addition to the uniform surface, the outer surface should be free of obvious stains and other defects. The keys should be firm and not easy to slow down or fall off. There should be no mistakes in the scales, symbols and text. The position should be accurate. The engraving or printing must be clear and distinct without slipping. 3.8.3
The optical structure should be regular , no dark image is visible during the test. 4 Test method
Follow the provisions of J8/T8243.5.
Follow the method specified in JB/T8248.2.
4.3 Gradient coefficient
Follow the provisions of JB/T8248.3.
4.4 Resolution
4.4.1 Test volume
4.4.1,1 Resolution test chart
4.4.1.1.1 The unit of the national pattern is the cumulative white line, the line length is 5 baskets of its interval, and the line pattern width and each spacing are equal: 4.4.1.12
From the pattern, use three-line training benzene pattern, see Figure 1 layout The difference between the bottom and top line density in the pattern is 1.4: The units are arranged in geometric progression with a common ratio of 0 (=1.122), from 1 line/mm to 36 lines/mm, with a total of 21 groups. 4.4.1.1.3 The resolution and line size of each group shall be as specified in Table 3. 4.4.1.1.4 The absolute value of the difference between the actual size and the nominal size of the line shall not exceed 5% of the nominal size. For the resolution test, the resolution test board is 4, 4.1.2 Grouping rate test board Figure 1 Resolution test board Table 9 Resolution and line size JA/T 1007D—2002
OLSTHO
4.4.1.2.1 The resolution standard consists of a base plate and a resolution test chart. The size should meet the test requirements of the lens under test: the chart is arranged in a cross shape. When the diagonal length is 2D, the field of view outside the center refers to: 0.5D, 0.7D, 0.85D from the intersection of the diagonals. 4.4.1.2.2 A radial pattern with an outer diameter of 3mm and an inner diameter of 2mm is pasted in the center of the resolution target plate for focusing. 4.4.12.3 The bottom plate surface should be smooth, without obvious convexity, concavity or warping, black in color, with a reflectivity of less than 10%, or a reflectivity of more than 10%. 4.4.1.3 Viewing frosted glass sheet
One side of the frosted glass sheet should be polished and 305 diamond fine grained. 4.4.2 Test procedure
The lens to be tested should be mounted on a special test device for the base station. When the optical support and F are set, use 8x or 10x magnification to view the resolution image on the frosted film at the film side position, find out the resolution limits of the radial resolution and radial resolution lines in each direction, and then read the radial resolution and radial resolution. During the test, the distance between the resolution test standard and the cavity plane must meet the image-object ratio of 104.4.3 Resolution required calculation period record
4.4.3.1 After the resolution values ​​of the same field of view are arithmetic averaged, the integers are rounded to the first decimal point. 4.4.3.2 The reading value and calculated value of the lens resolution are recorded with reference to the example in Table 4. Table 4 Lens resolution value calculated value record environment example Key specification: XXX
Port: XXX
Compensation: XXX
Stray light coefficient
Center measurement
Follow the method specified in T824B4.
4.6 Color index
Follow the method specified in JB/T8251.
4.7 Operation performance
Manual inspection:
4.8 Appearance
Inspect under 1U0W white light.
5 Marking
0.5 Tax field
Auxiliary lens number: XXX
F number: XXX
Center
Outer field
0.7 Standard field
Each portrait lens should have the following markings: focal length, upper number, manufacturer's name and export number. 6 Packaging, transportation and storage
Related regulations JB8250.bzxz.net
0.85 Ship field
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