SU61666A1 - Phosphorescent light meter - Google Patents
Phosphorescent light meterInfo
- Publication number
- SU61666A1 SU61666A1 SU1264A SU1264A SU61666A1 SU 61666 A1 SU61666 A1 SU 61666A1 SU 1264 A SU1264 A SU 1264A SU 1264 A SU1264 A SU 1264A SU 61666 A1 SU61666 A1 SU 61666A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- screen
- phosphorescent
- phosphorescent light
- light meter
- light
- Prior art date
Links
Description
Предметом изобретени вл етс фосфоресцентный экспонометр дл измерени интенсивности света нутем измерени отношени ркостей двух частей фосфоресцирующего экрана, наблюдаемых непосредственно после выключени измер емого света. Одна часть экрана прикрыта нейтрально-серым фильтром со стороны измер емого света, а втора часть снабжена таким же точно фильтром с противоположно стороны экрана.The subject of the invention is a phosphorescent exposure meter for measuring the intensity of light by measuring the ratio of the intensities of the two parts of the phosphorescent screen observed immediately after turning off the measured light. One part of the screen is covered with a neutral gray filter on the side of the measured light, and the second part is equipped with the same filter on the opposite side of the screen.
Схема примерной формы выполнени предлагаемого экспонометра изображена на чертеже.A diagram of an exemplary embodiment of the proposed exposure meter is shown in the drawing.
Измер емый свет через отверстие в диафрагме D падает на фосфоресцирующий экран Р. Лева половина экрана закрыта нейтральным фильтром F, такой же фильтр имеетс за правой половиной экрана. За левой половиной экрана расположен нейтральный фотометрический клин Х- При передвижении диафрагмы D вправо включаетс возбуждающий свет и открываетс окул р L, через который наблюдатель видит два фосфоресцирующих пол на экране Я. Клином К пол выравнивают до одинаковой ркости.The measured light through the hole in the diaphragm D falls on the phosphorescent screen R. The left half of the screen is covered by a neutral filter F, the same filter is behind the right half of the screen. Neutral photometric wedge X- is located behind the left half of the screen. When the diaphragm D is moved to the right, excitation light is turned on and the ocular L opens, through which the observer sees two phosphorescent fields on screen I. Klin K K aligns the floor to equal brightness.
Нелинейна зависимость между интенсивностью падающего света и ркостью фосфоресцирующих экранов приводит к тому, что при разных интенсивност х возбуждающего света разным вл етс отношение ркостей полей экрана. Сравнива прибор с эталонным экспонометром, можно градуировать клин в соответствующих единицах. Фосфор дл экрана подбираетс в зависимости от условий работы.The nonlinear relationship between the intensity of the incident light and the brightness of the phosphorescent screens leads to the fact that at different intensities of the exciting light, the ratio of the intensities of the screen fields is different. By comparing the device with the reference exposure meter, you can calibrate the wedge in the appropriate units. Phosphorus for the screen is selected depending on the operating conditions.
Благодар нелинейности закона затухани свечени фосфоресцирующего экрана, описанным прибором можно измер ть интенсивность света путем измерени времени с момента выключени измер емого света до момента выравнивани ркостей обеих половин экрана. В этом случае фотометрический клин в приборе отсутствует.Due to the non-linearity of the decay law of the luminescence of the phosphorescent screen, the described instrument can measure the light intensity by measuring the time from the moment the measured light is turned off until the equalization of the halves of both halves of the screen. In this case there is no photometric wedge in the device.
Предмет изобретени Subject invention
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU1264A SU61666A1 (en) | 1941-03-08 | 1941-03-08 | Phosphorescent light meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU1264A SU61666A1 (en) | 1941-03-08 | 1941-03-08 | Phosphorescent light meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU61666A1 true SU61666A1 (en) | 1941-11-30 |
Family
ID=48243021
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU1264A SU61666A1 (en) | 1941-03-08 | 1941-03-08 | Phosphorescent light meter |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU61666A1 (en) |
-
1941
- 1941-03-08 SU SU1264A patent/SU61666A1/en active
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