Background introduction:
In March 8th, LEDAER received a large curvature of the lens, a total of 10 films, which are divided into small pieces and a little larger sample of two, each of the 5. Combined with the two large samples provided by 250mm*80mm, a total of 12 tablets. After calibration of the equipment, the 12 pieces were tested.
The equipment uses the advanced Slope Error RMS evaluation, and the wavefront RMS slightly different, but there is a strong correlation.
Display the color map of the color of the color map corresponding to the following figure:
Color legend, the blue value is small, red larger
Test results of small lenses:
1#：
2#：
3#：
4#：
5#：
The results are as follows:
|
|
curvature(mm) |
Slope(mrad) |
|
1# |
-5895 |
0.019 |
|
2# |
-6175 |
0.022 |
|
3# |
-6295 |
0.016 |
|
4# |
-6260 |
0.033 |
|
5# |
-5955 |
0.098 |
Result description:
(1), expressed as a minus curvature convex curvature;
(2), 4# as a result of the initial writing of the identification number written on the convex surface, the sign number changed after the re measurement, the above is the revised test results;
(3) because of the large error of 5#, Slope may be inaccurate.
Test results of medium size lens:
1#：
2#：
3#：
4#：
5#：
The results are as follows:
curvature(mm)
Slope(mrad)
1#
-33600
0.037
2#
-33300
0.035
3#
-31600
0.037
4#
-28600
0.025
5#
-36400
0.046
Result description:
(1), expressed as a minus curvature convex curvature;
(2) due to the influence of the left side error, the error of partial measurement may be caused by 5#.
Test results of large size lenses:
1#：
The left side of the image is the error distribution of the whole lens fitting. The best curvature is near 350m;
If only the center region is fitted, the optimal curvature is near 200m.
1# error distribution of the whole lens
1#Error distribution in the central region
2#：
The left side of the image is the error distribution of the whole lens fitting, without the best curvature, the surface of the lens is not smooth, resulting in the overall error is large, but does not have regular curvature.
If only the area of the center is fitted, the effect of the flat mirror.
2# Error distribution of the whole lens
2# Error distribution in the central region
In the measurement of these two large lenses, because there is no ideal lens bracket, the use of double-sided adhesive bonding back, which may affect the curvature of the lens.
