SU651375A1 - Arrangement for measuring contrast transfer function of optical systems - Google Patents
Arrangement for measuring contrast transfer function of optical systemsInfo
- Publication number
- SU651375A1 SU651375A1 SU772533935A SU2533935A SU651375A1 SU 651375 A1 SU651375 A1 SU 651375A1 SU 772533935 A SU772533935 A SU 772533935A SU 2533935 A SU2533935 A SU 2533935A SU 651375 A1 SU651375 A1 SU 651375A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- transfer function
- optical systems
- contrast transfer
- arrangement
- optical
- Prior art date
Links
Landscapes
- Eye Examination Apparatus (AREA)
Description
нным шагом пр моугольные прозрачные риски (штрихи) 11.by this step, rectangular transparent risks (strokes) 11.
Устройство работает следующим образом .The device works as follows.
Испытуемый обьектив устанавливают между блоками 1 и 4. Блок 1 вращаетс с помощью привода 9 с посто нной скоростью и освещаетс с внутренней стороны источником 2 света через конденсатор 3. ерез испытуемый объектив и объектив 5 блоком 1 фсз(рмируетс изображенве тест-объекта в плоскости щелевой Д1шфрагмы в.The test lens is installed between blocks 1 and 4. Block 1 is rotated by a drive 9 at a constant speed and illuminated from the inside by a source 2 of light through a capacitor 3. Through the test lens and lens 5 by unit 1 fsz (the image of the test object in the plane of the slit is measured) D1shfragmy c.
Фотоприемник 7. расположенный за диафрагмой 6, преобразует изменение caeтового потока в электрический сигнал, поступающий на шож анализатора спектра 10, где воспроизводитс частотный спектр подйваемого на него электрического сиг нала. Значеьш частотных составл ющих этого сигнала соответствуют значени м частотно-контрастных характеристик испытуемого объектива на пространственных частотах, которые кратны величине i/T (фиг. 2).The photodetector 7. located behind the diaphragm 6, converts the change in the caetocurrency into an electrical signal fed to the spectrum analyzer 10, which reproduces the frequency spectrum of the electrical signal fed to it. The values of the frequency components of this signal correspond to the values of the frequency-contrast characteristics of the test lens at spatial frequencies that are multiples of i / T (Fig. 2).
Технико-экономический эффект изобретёш заключаетс в повышении точности работы устройства.The technical and economic effect of the invention consists in increasing the accuracy of the device.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU772533935A SU651375A1 (en) | 1977-10-17 | 1977-10-17 | Arrangement for measuring contrast transfer function of optical systems |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU772533935A SU651375A1 (en) | 1977-10-17 | 1977-10-17 | Arrangement for measuring contrast transfer function of optical systems |
Publications (1)
Publication Number | Publication Date |
---|---|
SU651375A1 true SU651375A1 (en) | 1979-03-05 |
Family
ID=20728957
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU772533935A SU651375A1 (en) | 1977-10-17 | 1977-10-17 | Arrangement for measuring contrast transfer function of optical systems |
Country Status (1)
Country | Link |
---|---|
SU (1) | SU651375A1 (en) |
-
1977
- 1977-10-17 SU SU772533935A patent/SU651375A1/en active
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