SU84531A1 - A way to visually convert a negative image into a positive - Google Patents
A way to visually convert a negative image into a positiveInfo
- Publication number
- SU84531A1 SU84531A1 SU382079A SU382079A SU84531A1 SU 84531 A1 SU84531 A1 SU 84531A1 SU 382079 A SU382079 A SU 382079A SU 382079 A SU382079 A SU 382079A SU 84531 A1 SU84531 A1 SU 84531A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- positive
- way
- negative image
- negative
- image
- Prior art date
Links
Landscapes
- Projection-Type Copiers In General (AREA)
Description
Известные способы оценки качества и чтени негативов до печати с них позитивных отпечатков не позвол ют быстро определ ть качество и отбирать необходимое фото и кинонегативы.The known methods of assessing the quality and reading of negatives before printing positive prints from them do not allow to quickly determine the quality and select the necessary photos and film negatives.
В описываемом способе этот недостаток устранен тем, что изобр,ажение негатива проицируетс с помоп ыо инфракрасных лучей на фосфоресцирующий экран, кратковременно засвеченный ультрафиолетовым или видимым светом.In the described method, this disadvantage is eliminated by the fact that the image, the negative reduction of the negative is projected with the help of infrared rays on a phosphorescent screen, briefly illuminated by ultraviolet or visible light.
На чертсл е 1редставлеиа схема описываемого прибора дл превращени негативного изображени в позитивное.At drawing 1 is a diagram of the described device for converting a negative image into a positive one.
В светоиепроницаемом щике установлен источник излучени 1 содержащей в спектре )ракрасные лучп, которые проход т через фильтр 2, пропускающий только инфракрасные лучи, и конденсатор 3. Затем изображение с негатива 5 отбрасываетс объективом 4 на фосфоресци )ующий экран 6. Предварительно экран 6 освещаетс источником ультрафиолетового излучени Действие описываемого прибора заключаетс в следующем.In the light-permeable box there is a radiation source 1 containing in the spectrum) red rays that pass through filter 2, which transmits only infrared rays, and capacitor 3. Then the image from negative 5 is rejected by lens 4 onto the phosphorescent screen 6. Preliminary screen 6 is illuminated by the source ultraviolet radiation. The operation of the described device is as follows.
На фосфоресцирующий экран, предварительно освещенный ультрафиолетовым или видимым светом, проицируетс с помощью инфракрасных лучей изображение негатива. Фосфоресценци гаситс в местах изображени , соответствующих светлы.м местам негатива, и на экране получаетс позитивное изображение.On the phosphorescent screen, pre-illuminated by ultraviolet or visible light, a negative image is projected using infrared rays. The phosphorescence is quenched at the image locations corresponding to the light of the negative, and a positive image is obtained on the screen.
Описываемый прибор позвол ет увеличивать или уменьшать изображение на экране по сравнению с негативом.The described device allows you to increase or decrease the image on the screen compared to the negative.
П р е д м е т и з о б р е т е и и PRIOR DIRECTORSHIP and
Способ визугльного преобразовани негативного изображени в позитивное , отличающийс тем. что, с целью контрол и чтени негативов , последние проицируютс на люмииесцирующпй экран с иомо11: ,ью источника инфракрасного излучени .A way of converting a negative image to a positive one, differing in that. that, in order to control and read the negatives, the latter are projected on a luminescent screen with an infrared source.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU382079A SU84531A1 (en) | 1948-07-27 | 1948-07-27 | A way to visually convert a negative image into a positive |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU382079A SU84531A1 (en) | 1948-07-27 | 1948-07-27 | A way to visually convert a negative image into a positive |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU772478130A Addition SU628476A2 (en) | 1977-04-19 | 1977-04-19 | Thyristorized voltage stabilizer |
Publications (1)
Publication Number | Publication Date |
---|---|
SU84531A1 true SU84531A1 (en) | 1949-11-30 |
Family
ID=48257190
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU382079A SU84531A1 (en) | 1948-07-27 | 1948-07-27 | A way to visually convert a negative image into a positive |
Country Status (1)
Country | Link |
---|---|
SU (1) | SU84531A1 (en) |
-
1948
- 1948-07-27 SU SU382079A patent/SU84531A1/en active
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