DE724026C - Television projection tubes - Google Patents
Television projection tubesInfo
- Publication number
- DE724026C DE724026C DEB177690D DEB0177690D DE724026C DE 724026 C DE724026 C DE 724026C DE B177690 D DEB177690 D DE B177690D DE B0177690 D DEB0177690 D DE B0177690D DE 724026 C DE724026 C DE 724026C
- Authority
- DE
- Germany
- Prior art keywords
- mirror
- lens
- concave
- tube
- fluorescent screen
- 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
- 230000007547 defect Effects 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000013507 mapping Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/74—Projection arrangements for image reproduction, e.g. using eidophor
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B17/00—Systems with reflecting surfaces, with or without refracting elements
- G02B17/08—Catadioptric systems
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B17/00—Systems with reflecting surfaces, with or without refracting elements
- G02B17/08—Catadioptric systems
- G02B17/0856—Catadioptric systems comprising a refractive element with a reflective surface, the reflection taking place inside the element, e.g. Mangin mirrors
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B17/00—Systems with reflecting surfaces, with or without refracting elements
- G02B17/08—Catadioptric systems
- G02B17/0884—Catadioptric systems having a pupil corrector
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
- G02B23/12—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices with means for image conversion or intensification
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Astronomy & Astrophysics (AREA)
- Lenses (AREA)
Description
Fernsehprojektionsröhre Die Erfindung betrifft die verbesserte Ausgestaltung von Fernsehprojektionsröhren, bei denen das Fluoreszenzschirmbild mit Hilfe eines Hohlspiegels und einer die Abschlußwand der Röhre bildenden Linse abgebildet wird.Television projection tube The invention relates to the improved design of television projection tubes, in which the fluorescent screen image with the help of a Concave mirror and a lens forming the end wall of the tube is imaged.
Bei einer bekannten Proj ektionsröhre dieser Art besteht die eine Röhrenabschlußlvand aus einem der inneren Seite des Fl.uoreszenzschirmes zugekehrten einfachen Hohlspiegel und die andere Abschl.ußwand aus einer Sammellinse. Diese Spiegeloptik ergibt ein unbrauchbares Bild des ausgedehnten Fluoreszen.zschirmes, weil sie reit starken sphärischen, chromatischen und Randfehlern behaftet ist.In a known projection tube of this type there is one Tube end wall from one facing the inner side of the fluorescent screen simple concave mirror and the other end wall from a converging lens. These Mirror optics result in an unusable image of the extended fluorescent screen, because it is afflicted with strong spherical, chromatic and marginal defects.
Es ist an sich in der Optik bekannt, zur Aufhebung von sphärischen und chromatisehen Fehlern einen Linsenspiegel mit einer Konvexkonkavlinse zu vereinigen. Dies ist aber nur bei der Abbildung von achsennahen Objektiven geringer Ausdehnung, z. B. durch Fernrohr- oder Mikroskopobjektive, möglich, nicht aber bei der Abbildung räumlich weit ausgedehnter und weit aus dem Axialbereich hinausragender Objekte, wie es das Fluoreszenzschirmbil.d einer Fernsehproj-ektionsröhre darstellt.It is known per se in optics to cancel spherical ones and chromatic errors to unite a lens mirror with a convex-concave lens. However, this is only possible when imaging near-axis lenses of small dimensions, z. B. by telescope or microscope lenses, possible, but not in the illustration objects that are spatially extensive and protrude far from the axial area, as shown by the fluorescent screen image of a television projection tube.
Die Erfindung betrifft eine Ferusehprojektionsröhre, bei der das Fluoreszenzschirmbild mit Hilfe eines Hohlspiegels und einer die Abschlußwand der Röhre bildenden Linse abgebildet wird, und kennzeichnet sich dadurch, daß die spiegelnde Fläche Bestandteil eines Linsenspiegels (Manginspiegel) ist, daß die konvexkonkave Äbschlußlinse auf ihrer konkaven Fläche mit dem gewölbten Fluoreszenzschirm bedeckt ist, und daß die Bestandteile derart aufeinander abgestimmt sind, daß eine achromatische, aplanatische und anastigmatische Abbildung erreicht wird.The invention relates to a Feruseh projection tube in which the fluorescent screen image with the help of a concave mirror and a lens forming the end wall of the tube is mapped, and is characterized by the fact that the reflective surface is a component of a lens mirror (Mangin mirror) is that the convex-concave final lens on its concave surface is covered with the curved fluorescent screen, and that the Components are coordinated in such a way that an achromatic, aplanatic and anastigmatic mapping is achieved.
In der Abbildung ist ein Ausführungsbeispiel der Erfindung dargestellt.In the figure, an embodiment of the invention is shown.
Die Projektionsröhre besteht aus dem die optischen Projektionsmittel enthaltenden Teil i und dem nicht näher dargestellten, die elektrische Anordnung enthaltenden Teil 2. Der Röhrenteil i wird auf der einen Seite von der Konvexkonkavlinse 3 und auf der anderen Seite von dem Linsenspiegel 4 (Manginspiegel) abgeschlossen, der in seinem mittleren Teil den Röhrenteil 2 trägt. Auf der dem Gehäuseinnern zugewendeten Konkavfläche der Linse 3 ist in der Mitte der Leuchtschirm 5 vorgesehen, der gegebenenfalls zur Verstärkung der Strahlung einen lichtreflektierenden Untergrund 5 i haben kann. Der Linsenspiegel 4. hebt die chromatischen Fehler auf und bildet in Verbindung mit der Konvexkonkavl.ins.e ein aplanatischcs und anastigmatisches System.The projection tube consists of the optical projection means containing part i and the not shown, the electrical arrangement containing part 2. The tube part i is on one side of the convex-concave lens 3 and closed on the other side by the lens mirror 4 (Mangin mirror), which carries the tube part 2 in its middle part. On the one facing the inside of the case Concave surface of the lens 3 is provided in the center of the luminescent screen 5, which optionally can have a light-reflecting background 5 i to amplify the radiation. The lens mirror 4. cancels the chromatic errors and forms in connection with the convex-concave ins.e an aplanatic and anastigmatic system.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEB177690D DE724026C (en) | 1937-03-11 | 1937-03-11 | Television projection tubes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEB177690D DE724026C (en) | 1937-03-11 | 1937-03-11 | Television projection tubes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE724026C true DE724026C (en) | 1942-08-15 |
Family
ID=7008247
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DEB177690D Expired DE724026C (en) | 1937-03-11 | 1937-03-11 | Television projection tubes |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE724026C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2730013A (en) * | 1950-09-02 | 1956-01-10 | Leitz Ernst Gmbh | Reflecting lens objective |
| US2730926A (en) * | 1954-08-25 | 1956-01-17 | Back Frank Gerard | Catadioptric telephoto objective systems |
| US2817270A (en) * | 1955-12-12 | 1957-12-24 | Leitz Ernst Gmbh | Telescope objective systems |
| US3326621A (en) * | 1961-01-19 | 1967-06-20 | Nygorden Per Johan Berggren De | Catadioptric imaging systems |
| US4108539A (en) * | 1976-11-18 | 1978-08-22 | Hewlett-Packard Company | Reflecting lens system |
-
1937
- 1937-03-11 DE DEB177690D patent/DE724026C/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2730013A (en) * | 1950-09-02 | 1956-01-10 | Leitz Ernst Gmbh | Reflecting lens objective |
| US2730926A (en) * | 1954-08-25 | 1956-01-17 | Back Frank Gerard | Catadioptric telephoto objective systems |
| US2817270A (en) * | 1955-12-12 | 1957-12-24 | Leitz Ernst Gmbh | Telescope objective systems |
| US3326621A (en) * | 1961-01-19 | 1967-06-20 | Nygorden Per Johan Berggren De | Catadioptric imaging systems |
| US4108539A (en) * | 1976-11-18 | 1978-08-22 | Hewlett-Packard Company | Reflecting lens system |
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