GB998234A - A colour television camera - Google Patents
A colour television cameraInfo
- Publication number
- GB998234A GB998234A GB34114/63A GB3411463A GB998234A GB 998234 A GB998234 A GB 998234A GB 34114/63 A GB34114/63 A GB 34114/63A GB 3411463 A GB3411463 A GB 3411463A GB 998234 A GB998234 A GB 998234A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lens
- caused
- front part
- field
- relay lens
- 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.)
- Expired
Links
- 230000003287 optical effect Effects 0.000 abstract 3
- 201000009310 astigmatism Diseases 0.000 abstract 1
- 238000006073 displacement reaction Methods 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B15/00—Optical objectives with means for varying the magnification
- G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
- G02B15/142—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having two groups only
- G02B15/1421—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having two groups only the first group being positive
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/10—Cameras or camera modules comprising electronic image sensors; Control thereof for generating image signals from different wavelengths
- H04N23/13—Cameras or camera modules comprising electronic image sensors; Control thereof for generating image signals from different wavelengths with multiple sensors
- H04N23/16—Optical arrangements associated therewith, e.g. for beam-splitting or for colour correction
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Lenses (AREA)
Abstract
998, 234. Optical systems. FUJI SHASHIN KOKI KABUSHIKI KAISHA, and NIPPON TELEVI HOSOMO KABUSHIKI KAISHA. Aug. 28, 1963, No. 34114/63. Heading G2J. [Also in Division H4] In a colour television camera image light is directed via an appropriate object lens 1 and field lens 2, both mounted in a rotatable turret, front part 3, 4 of a relay lens arrangement, fixed diaphragm 5, dichroic mirrors 6, 7 and rear part 8, 9 of the relay lens arrangement on to image orthicons 10, the focusing being done by forward and rearward displacement of front part 2, 3, 4 of the relay lens arrangement so as to make the image formed by the object lens 1 coincide with the front principal plane of the field lens 2. The rear principal plane of field lens 2 coincides with the front focal plane of the part 3, 4 of the relay lens arrangement so that light rays leave the part 3, 4 and pass through the dichroic mirrors 6 and 7 as parallel rays thus preventing change of reflection characteristics caused by change of incident angle, astigmation caused by the inclined dispositions of the mirrors, change of optical path length caused by the tolerance errors in the thickness of the mirrors and ghost images. The images on the photo-cathodes of the three orthicons are of identical shape and size as that at the image plane of the object lens since the front part 3, 4 and rear part 8, 9 are of equal focal length. The increase in the Petzval sum caused by field lens 2 is counteracted by negative lens 9, thus for the relay lens as a whole the Petzval sum is almost zero which results in substantially complete correction of field curvature and astigmatism. The abberrations caused by front part 3, 4 and rear part 8, 9 counteract each other and the distortion caused by negative lens 9 is cancelled. The front part of the relay lens consists of a positive lens group (2 lenses) and a negative lens group (3 lenses) forming together a telephoto type lens. To adjust the camera the field lens turret has a mount for holding a test chart 11 and a lamp 12 which illuminates the rear face of the chart since the mount has no corresponding object lens. Optical data are provided for one example, Fig. 3, not shown.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US298606A US3293357A (en) | 1963-07-30 | 1963-07-30 | Internal focusing color television camera |
| GB34114/63A GB998234A (en) | 1963-08-28 | 1963-08-28 | A colour television camera |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB34114/63A GB998234A (en) | 1963-08-28 | 1963-08-28 | A colour television camera |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB998234A true GB998234A (en) | 1965-07-14 |
Family
ID=10361540
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB34114/63A Expired GB998234A (en) | 1963-07-30 | 1963-08-28 | A colour television camera |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB998234A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2419634A1 (en) * | 1978-03-10 | 1979-10-05 | Canon Kk | LENS ASSOCIATED TELEVISION CAMERA |
-
1963
- 1963-08-28 GB GB34114/63A patent/GB998234A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2419634A1 (en) * | 1978-03-10 | 1979-10-05 | Canon Kk | LENS ASSOCIATED TELEVISION CAMERA |
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