ST-147A optical resin lens-Table 4
In the design of the telescope, in order to shorten the light path, shorten the lens body and increase the brightness, one field lens is often introduced into the eyepiece. The field lens is a positive lens (convex lens). ST-147A field lens is almost used for 8×40 zoom binocular telescopes. Its parameters are as follows: | ||
Outside diameter ø=21mm | Effective apertureD0=20mm | |
Center thickness=5.8mm | Edge thickness=1.65mm | |
Focal length f'=29.057 |
Front intercept sf=-27.74mm |
Back intercept sf'=26.32mm |
Lifesize field lens | |
![]() |
Table 4 Data of“STOEMI” optical resin lens
No. |
Name |
Type |
f′ |
sf |
sf′ |
D0 |
OD(Φ) |
Center thickness |
Edge thickness |
Picture |
ST-146 |
Eyepiece of viewfinder |
Plano-convex |
108.59 |
-105.51 |
108.59 |
21.1×14.2 |
3.9 |
2.5 |
|
|
ST-147 |
Field lens |
Double convex |
25.78 |
-24.33 |
22.78 |
20 |
21 |
6.4 |
1.5 |
|
ST-147A |
Field lens |
Double convex |
29.057 |
-27.74 |
26.32 |
20 |
21 |
5.8 |
1.65 |
|
ST-148-1.5X |
Biocular magnifier |
Plano-convex |
494.61 |
-494.61 |
491.59 |
74.5×28.4 |
4.5 |
3 |
|
|
ST-148-2X |
Biocular magnifier |
Plano-convex |
248.48 |
-248.48 |
245.46 |
74.5×28.4 |
4.5 |
3 |
|
|
ST-148-3X |
Biocular magnifier |
Plano-convex |
167.22 |
-167.22 |
164.2 |
74.5×28.4 |
4.5 |
3 |
|
|
ST-149 |
Hydrological encoder |
Plane ring |
|
|
|
65 |
65×1.5 |
3孔 |
1.5 |
|
ST-150 |
Field lens |
Aspheric |
79.5 |
-73.6 |
82.29 |
20 |
21 |
4 |
2.95 |
|
ST-151 |
Camera objectvie lens |
Ceniscus |
20.5 |
-21.5 |
18.39 |
6 |
7 |
1.8 |
1.13 |
|
ST-152 |
Extended lens |
Ceniscus |
-40.53 |
39.96 |
-41.78 |
7 |
8 |
1 |
1.44 |
|
ST-153 |
Protection lens |
Plane |
|
|
|
|
13 |
1.5 |
1.5 |
|
ST-154 |
Reflection lens |
Plano-convex |
|
|
|
|
11×6.5 |
1.2 |
1.2 |
|
ST-155 |
Splitting lens |
Plane |
|
|
|
24.4×22.7×1 |
1 |
1 |
|
|
ST-156 |
Back window |
Plane |
|
|
|
24.4×17.5×0.72 |
0.72 |
0.72 |
|
|
ST-157 |
Aspheric reflection lens |
Double convex |
|
|
|
26×17 |
2.5 |
|
|
|
ST-158 |
Concave lens |
Double concave |
737.5 |
|
|
100 |
103 |
2.5 |
6 |
|
ST-159 |
7×50 field lens |
Double convex |
45.6 |
-42.95 |
44.28 |
24 |
26 |
5.8 |
1.83 |
|
ST-160 |
Filter |
Red, yellow, orange |
|
|
|
18 |
19 |
1.5 |
1.5 |
|
ST-161 |
Eyepiece of viewfinder |
Plano-convex |
30.152 |
-30.152 |
28.509 |
10×7 |
2.45 |
1.58 |
|
|
ST-162 |
Objective lens of viewfinder |
Aspheric |
-11.559 |
11.674 |
-12.973 |
15.5×10 |
2.3 |
2.5 |
|
|
ST-163 |
Lens |
Ceniscus |
30.606 |
-33.21 |
26.6 |
8.5 |
11 |
2.6 |
1.66 |
|
ST-164 |
Objective lens of viewfinder |
Plano-concave |
-14.66 |
15.67 |
-14.66 |
6×10 |
2.33 |
5 |
|
|
ST-165 |
Objective lens 2 |
Double concave |
-34.38 |
34.85 |
-34.85 |
12×9 |
2.3 |
2.94 |
|
|
ST-166 |
Eyepiece of viewfinder |
Plano-convex |
24.906 |
-22.69 |
24.906 |
12×9 |
3.3 |
2.44 |
|
|
ST-167 |
Objective lens of viewfinder |
Plano-concave |
-28.31 |
|
-27.7 |
16.2×11 |
1.25 |
3.82 |
|
|
ST-168 |
Eyepiece of viewfinder |
Plano-convex |
54.778 |
|
53.5 |
12.3×8.3 |
2 |
1.5 |
|
|
ST-169 |
Camera lens |
Ceniscus |
31 |
-32.77 |
28.19 |
8.5 |
11.9 |
1.77 |
1.11 |
|
ST-170 |
Objective lens of viewfinder |
Double concave |
|
|
-51.5 |
22.5×16 |
2.1 |
5 |
|
|
ST-171 |
Eyepiece of viewfinder |
Plano-convex |
75.76 |
|
72.4 |
19×14 |
3.2 |
2.2 |
|
|
ST-172 |
Objective lens of viewfinder |
Plano-concave |
12.125 |
|
11.9 |
16.8×11.3 |
2 |
6 |
|
|
ST-173 |
Eyepiece of viewfinder |
Double convex |
29.16 |
|
26.8 |
12.8×7.5 |
3.8 |
2.8 |
|
|
ST-174 |
Camera lens 1 |
Ceniscus |
43.8 |
-48.32 |
38.73 |
7 |
10.6 |
2.33 |
1.1 |
|
ST-175 |
Camera lens 2 |
Ceniscus |
60.54 |
-59.25 |
61.1 |
5.3 |
10.4 |
1.08 |
1.33 |
|
ST-176 |
Field lens |
Double convex |
34.133 |
-32.14 |
32.544 |
20.5 |
21.5 |
5.2 |
1.56 |
|
ST-177 |
Field lens |
Double convex |
31.15 |
-30.88 |
29.05 |
15 |
16 |
3.5 |
1.28 |
|
ST-178 |
Camera lens 1 |
Ceniscus |
18.86 |
-19.28 |
16.878 |
9.08 |
11.6 |
2.4 |
2.21 |
|
ST-179 |
Camera lens 2 |
Double concave |
-11.82 |
12.06 |
-11.9 |
5.7 |
11.6 |
0.5 |
0.91 |
|
ST-180 |
Camera lens 3 |
Double convex |
16.292 |
-15.87 |
15.9 |
4.5 |
8.87 |
1.2 |
1.18 |
|
ST-181 |
Camera lens 1 |
Ceniscus |
16.653 |
-17.33 |
13.554 |
8.2 |
13.45 |
3.8 |
1.67 |
|
ST-182 |
Camera lens 2 |
Double concave |
-9.654 |
10.152 |
-9.69 |
6.8 |
11.3 |
.85 |
0.95 |
|
ST-183 |
Camera lens 3 |
Double convex |
17.334 |
-17.13 |
16.617 |
5.4 |
10.35 |
|
1.45 |
|
ST-184 |
Objective lens of viewfinder |
Ceniscus |
45.324 |
46.46 |
-45.19 |
16.4×11 |
1.03 |
0.9 |
|
|
ST-185 |
Camera lens 1 |
Ceniscus |
35.71 |
-38.34 |
31.86 |
8.8 |
9.79 |
2.26 |
1.68 |
|
ST-186 |
Camera lens 2 |
Ceniscus |
68.966 |
-65.98 |
70.7 |
3.3 |
8 |
1.98 |
1.92 |
|
ST-187 |
Objective lens of viewfinder |
Aspheric |
-28.88 |
-29.68 |
-28.88 |
18.8×11 |
1.6 |
3.68 |
|
|
ST-188 |
Eyepiece of viewfinder |
Plano-convex |
45.14 |
-43.72 |
45.14 |
11.78×7.8 |
2.13 |
1.42 |
|
|
ST-189 |
Field lens |
Ceniscus |
41.84 |
-37.79 |
41.88 |
24 |
25 |
6 |
6.04 |
|
ST-190 |
NIR objective lens |
Aspheric |
84.82 |
-83.49 |
78.57 |
49 |
50 |
11.1 |
3.34 |
|
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
首页滚动产品
Address:Xi'an Baqiao Chaoyang Industrial Park Zip: 710025 Tel :0086-29-83385315 (Office) 0086-29-83319014 (Factory)
E-mail:siduo@stoemi.com http://www.stoemi.com FAX:0086-29-83236416(Office) 0086-29-83310433(Factory)
陕ICP备09021171号 Powered by www.300.cn