JPS5548742A - Film frame number counting mechanism - Google Patents
Film frame number counting mechanismInfo
- Publication number
- JPS5548742A JPS5548742A JP12234978A JP12234978A JPS5548742A JP S5548742 A JPS5548742 A JP S5548742A JP 12234978 A JP12234978 A JP 12234978A JP 12234978 A JP12234978 A JP 12234978A JP S5548742 A JPS5548742 A JP S5548742A
- Authority
- JP
- Japan
- Prior art keywords
- film
- light
- photoelectric conversion
- output wave
- projected
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Projection Apparatus (AREA)
Abstract
PURPOSE: To make it possible to simplify counting mechanism of frame number of film, to improve counting speed, and to simplify film loading, by arranging that a photoelectric conversion device receives reflected light from film surface, and when the projected light passes through the perforation of film the device does not receive any reflected light.
CONSTITUTION: A light of light source 4 is introduced through optical fiber 8, and the light is projected to the perforation belt of film 6 through both ends of branched fibers 8a and 8b. When the film is moving, the projected light is reflected at the film surface and passes through perforations 7a and 7b. The light received at photoelectric conversion devices 5a and 5b, therefore, becomes a constant output wave. This output wave is displayed at display section through a pulse shaping section, dividing circuit and pulse counting circuit. Moreover, by the phase of output wave produced at both photoelectric conversion devices 5a and 5b, the direction of film movement (positive or negative) can be detected.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12234978A JPS5548742A (en) | 1978-10-04 | 1978-10-04 | Film frame number counting mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12234978A JPS5548742A (en) | 1978-10-04 | 1978-10-04 | Film frame number counting mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5548742A true JPS5548742A (en) | 1980-04-08 |
Family
ID=14833727
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12234978A Pending JPS5548742A (en) | 1978-10-04 | 1978-10-04 | Film frame number counting mechanism |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5548742A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52108702A (en) * | 1976-03-09 | 1977-09-12 | Mitsubishi Electric Corp | Code transmission device |
| JPS5945731A (en) * | 1982-09-09 | 1984-03-14 | Agency Of Ind Science & Technol | Rotary photocoupler device |
| JPS59166542U (en) * | 1983-04-23 | 1984-11-08 | 住友重機械工業株式会社 | Optical data transmission equipment |
| JPH0470132A (en) * | 1990-07-10 | 1992-03-05 | Nec San-Ei Instr Co Ltd | Transmitter/receiver for optical transmission |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4217199Y1 (en) * | 1966-12-29 | 1967-10-03 |
-
1978
- 1978-10-04 JP JP12234978A patent/JPS5548742A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4217199Y1 (en) * | 1966-12-29 | 1967-10-03 |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52108702A (en) * | 1976-03-09 | 1977-09-12 | Mitsubishi Electric Corp | Code transmission device |
| JPS5945731A (en) * | 1982-09-09 | 1984-03-14 | Agency Of Ind Science & Technol | Rotary photocoupler device |
| JPS59166542U (en) * | 1983-04-23 | 1984-11-08 | 住友重機械工業株式会社 | Optical data transmission equipment |
| JPH0470132A (en) * | 1990-07-10 | 1992-03-05 | Nec San-Ei Instr Co Ltd | Transmitter/receiver for optical transmission |
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