SU1434391A1 - Focusing device - Google Patents
Focusing device Download PDFInfo
- Publication number
- SU1434391A1 SU1434391A1 SU864023984A SU4023984A SU1434391A1 SU 1434391 A1 SU1434391 A1 SU 1434391A1 SU 864023984 A SU864023984 A SU 864023984A SU 4023984 A SU4023984 A SU 4023984A SU 1434391 A1 SU1434391 A1 SU 1434391A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- modulator
- plate
- test object
- lens
- lenses
- Prior art date
Links
Landscapes
- Automatic Focus Adjustment (AREA)
Abstract
Изобретение относитс к оптичес- кому приборостроению, в частности к устройствам, предназначенным дл контрол положени фокальной плоскости объективов и линз. Целью изобретени вл етс повышение точности фокусировани путем введени в устройство модул тора глубинного сканировани и плоскопараллельной пластины, выравнивающей энергетические потери в разные полупериоды работы модул тора . Изображение тест-объекта З формируетс на датчике расфокусировки 7, дважды проходит через исследуемый объектив 2 посредством зеркала 1. Периодически удал ема пластина 5 выполн ет роль модул тора глубинного сканировани , а пластина 6 выравнивает энергетические потери от пластины 5 в разные полупериоды работы модул тора . Пластины 5 и 6 установлены параллельно тест-йбъекту на одной оси вращени и разнесены по этой оси относительно тест-объекта. При равенстве сигналов, обусловленных дофо- кальным и зафокальным изображени ми, исполнительный механизм прекращает перефокусировку объектива. 2 ил. с (ОThe invention relates to optical instrumentation, in particular, to devices designed to control the position of the focal plane of lenses and lenses. The aim of the invention is to improve the focusing accuracy by introducing a depth scan modulator and a plane-parallel plate into the device, equalizing the energy losses in different half-lives of the modulator. The image of the test object 3 is formed on the defocus sensor 7, passes twice through the lens 2 under study through the mirror 1. Periodically removing the plate 5 performs the role of a depth scanning modulator, and the plate 6 levels the energy losses from the plate 5 during different half-periods of the modulator. Plates 5 and 6 are installed parallel to the test object on the same axis of rotation and spaced along this axis relative to the test object. If the signals due to pre-focal and after-focus images are equal, the actuator stops refocusing the lens. 2 Il. c (o
Description
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Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU864023984A SU1434391A1 (en) | 1986-02-19 | 1986-02-19 | Focusing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU864023984A SU1434391A1 (en) | 1986-02-19 | 1986-02-19 | Focusing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU1434391A1 true SU1434391A1 (en) | 1988-10-30 |
Family
ID=21222231
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU864023984A SU1434391A1 (en) | 1986-02-19 | 1986-02-19 | Focusing device |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU1434391A1 (en) |
-
1986
- 1986-02-19 SU SU864023984A patent/SU1434391A1/en active
Non-Patent Citations (1)
| Title |
|---|
| PROCEEDINGS SPIE 79, 1976, р. 65, 57-71. * |
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