US2420198A - Two-way television communication unit - Google Patents
Two-way television communication unit Download PDFInfo
- Publication number
- US2420198A US2420198A US541155A US54115544A US2420198A US 2420198 A US2420198 A US 2420198A US 541155 A US541155 A US 541155A US 54115544 A US54115544 A US 54115544A US 2420198 A US2420198 A US 2420198A
- Authority
- US
- United States
- Prior art keywords
- pick
- intelligence
- reproducing
- screen
- visibly
- 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 - Lifetime
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/14—Systems for two-way working
- H04N7/141—Systems for two-way working between two video terminals, e.g. videophone
- H04N7/142—Constructional details of the terminal equipment, e.g. arrangements of the camera and the display
- H04N7/144—Constructional details of the terminal equipment, e.g. arrangements of the camera and the display camera and display on the same optical axis, e.g. optically multiplexing the camera and display for eye to eye contact
Definitions
- This invention relates to a unitary apparatus for picking up intelligence and translating it into electric signal impulses, as well as visibly reproducing signal impulses representative of intelligence.
- the invention relates to a unitary apparatus, for instance of the cabinet or box type which also can be portable, for television two-way communication which permits observation of televised intelligence ona viewing screen and simultaneously to pick '-Iup intelligence at the place of observation for transmitting it to a distant place and in particular to the one whence the observed televised intelligence comes.
- the invention is concerned with unitary apparatus for use in combination with telephone communication where a first conversant at one end of the line is enabled to view a screen on which a second conversant talking on, the other end of the line is televised, while the image of the first conversant is picked up and transmitted simultaneously to the second conversant on the other end of the line.
- Such an apparatus for two-way television communication can be physically combined with a sound receiver and transmitter, or r hand telephone set, which for instance, when the receiver is lifted, also switches in the television apparatus and switches it out when the receiver is replaced.
- Fig. 1 exemplifies rather schematically in vertical cross section and partly elevation a two-way communication apparatus according to the invention, and Fig. 2 in a similar manner a modification thereof,
- the invention is not limited to any particular type of apparatus for picking up intelligence and transforming it into electric signal impulses to be transmitted, or to any particular apparatus which visibly reproduces such signal impulses impressed upon it.
- a transmission pick-up apparatus any electric device can be used which comprisesfor instance a light sensitive signal plate, on which the intelligence to be transmitted is beingimaged, such as an iconoscope apparatus.
- the electric signal impulses representative of any kind of intelligence can be visibly reproduced, for instance by means of an apparatus operating on supersonic light modulating principles, or on the principles of controlling the optical qualities of a screen, such as a screen the reflecting power, or transparency, or opacity, or refractive index of which is varied locally and temporarily by an impinging modulated cathode ray beam or stream.
- Apparatus which use a screen of light emitting qualities which are affected by certain radiant energies preferably cathode rays impinging upon it, such as fluorescent material type screens, canalso be used to advantage.
- the invention primarily consists in a unit in which such a pick-up transmission device and reproducing apparatus are combined for the purpose of a two-way communication and permitting the realisation of the objects of the invention set forth hereinbefore and to be gathered from the subsequent specification.
- illuminating source l2 maybe connected with it, for instance arranged on top of cabinet I II, and emit visible light of adjustable brightness,- or not-blinding short wave or longwave invisible or nearly invisible light (ultra violet or infra-red rays, respectively) which affects, however, the correspondingly sensitized signal plate of the pick-up apparatus.
- the source of intelligence to be picked up and transmitted is assumed to consist in this exemplification in the face of a person iii in front of opening II who conducts a telephone conversation with another person at the other end of a telephone line.
- the telephone receiver and its connection with the apparatus or communication lines illustrated are not shown.
- the conversant at the other end of the line is the object the image of which is to be visibly reproduced in the apparatus viewed by the person I8 through opening II. It should be understood, however, that instead of an image of a conversant any other information can be transmitted and/or visibly reproduced.
- the viewing screen I4 of an electric signal impulses in particular television picture signals visibly reproducing apparatus I 5, for instance of the cathode ray operated fluorescent screen type, is arranged inside cabinet III essentially in the axis t 3 from the eyes of the conversant l8 talking at this end of the line.
- Cathode ray tube I5 comprises a neck I6 in which the cathode ray gun, the deflecting and modulating electrodes for the cathode ray beam are arranged in conventional manner so that the signals representative of intelligence of any kind which are impressed upon the cathode ray beam in tube I5 are reproduced in and can directly be viewed on screen I4.
- the signals received produce on the viewing screen a picture of the conversant on the other end of the line.
- a suitable raydividing means such as for instance a semitransparent 45 mirror I9, or prism, is arranged through which the person I8 can see the image or picture instantly produced on screen II, whereas an image of that person's face is simultaneously projected by mirror I8 through objective or imaging lens (system) upon the lightsensitive signal plate 2
- the output from the signal plate 2I of transmitter tube 22 is translated through an amplifier 52 and switch 23 upon the outgoing communication line 24.
- the signals, in particular picture signals incoming over line 25 and to be visibly reproduced, are translated through switch 26, line 21 and amplifier II upon the cathode ray beam in tube I5.
- the electrical circuits and arrangements for operating the pick-up and signals reproducing cathode ray tubes I5, 22 are well known in the art and need no detailed description or showing in the drawing. If the incoming or outgoing signals are respectively demodulated from and modulated upon carrier waves, circuits well known for these purposes can be arranged inside cabinet I0 or in an outside attachment, or in a separate unit connected with the one shown in any suitable way, such as by cable. Similarly the Sound may be transmitted and received over lines, or modulated upon carrier waves by methods and arrangements well known in the art. If the pick-up and/or signals reproducing apparatus 4 operate on the line and frame scanning principles synchronising signals for the line and frame scan in the various communicating units can be pro?
- mount 29 may be screw-threaded on the outside and engage a screw threaded support 30 so that by turning handle 3I in slit 43 in a plane about vertical to that of the drawing, mount 29 is turned within support 30 and lens 20 is raised or lowered and thereby the face of person I8 prop- I erly focused on signal plate 2
- switches 23, 26 are connected through rods 32, 33 with handle 34 outside front wall 28.
- the communication lines 24, 25 for the outgoing and incoming signal impulses are disconnected from the tubes I5, 22 and instead the signal plate 2I is connected through amplifier 52, switch 23 (in its position shown in dotted line), line 35 and amplifier I! with the reproducing tube I5.
- the person I8 views on screen I4 his own picture or that of the object to be televised, as it is being viewed upon transmission over communication line 24 by the distant conversant. Person I8 can thus check whether the picked up image or picture shows the desired details, or is blurred or distorted, or sharply focused.
- the reproducing and pickup tubes I5, 22 are operated in synchronism, and if there are more than two places or stations interconnected, synchronisation between all the pick-up and reproducing apparatus is then to be maintained by'a common synchronising signal generator.
- the synchronising signals may be transmitted over lines, or modulated on carrier waves transmitted along lines or by wireless the same as used for transmitting the modulating signals, the same or difierent transmission lines, and in particular different carrier wave lengths may be used for transmitting the sound.
- the horizontal and vertical line scanning impulses as well as line and frame scan synchronising impulses can be translated upon tubes I5, 22 for instance from a centralized source over the communication lines 24, 25 in the position of switch 23, 26 shown in full lines. these impulses and signals can be translated upon both tubes through the branch line 44, switch 25 (both shown in dotted lines) and line 21, 35, respectively, when the transmission lines are switched off, so that the image on signal plate 2
- any other suitable ray-dividing means can be used, such as for instance suitable lenses or spherical mirrors with center holes which may be fitted with other optical devices, such as lenses, prisms, etc. Illuminating light is then directed through the optical devices in the center hole upon a reflection-type screen of a cathode ray controlled light valve. and hence transmitted through a Schmidt-correction aspherical lens or spherical mirror upon the 45 mirror and the viewing screen.
- the apparatus for'visibly reproducing signals comprises a cathode ray tube or light valve 36, for instance.
- a transparency controlled ionic crystal screen 31 as described in my Patent No. 2,330,171, instead of a self-luminescent screen, or direct view reflection type screen as exemplified or explained with respect to Fig. 1.
- ing screen 38 is arranged in the axis of sight l3 behind the suitably inclined semi-transparent mirror I 9, and a source of visible illuminating light 39 and reflector 40 are arranged on the other side of tube screen 31.
- the light from source 39 and refiector 40 i projected through condenser lens system 4 l transparency controlled screen 31 and projection lens system 42 upon viewing screen 38 which may consist of ground glass.
- Incoming signals are impressed upon the modulating electrodes in neck 43 of tube 36, for instance, in the manner described in my above patent.
- tube screen 31 can be exposed to the un- A viewobstructed direct view by the observer or conversant i8 and if properly illuminated, directly viewed by him so that screen 38 can be omitted.
- the invention is not limited to any exempliflcation hereinbefore described or shown but is to be derived in its broadest aspects from the appended claims.
- or tube 22 can be made adjustable; tube 22 and lens system 20 with its support 30 can also be combined in a unit adjustable relative to mirror l9, both in angular direction as well as regarding its distance therefrom.
- the output of tube 22 can be either translated directly or through amplifiers 52, i1 upon the reproducing tube l5, and in the latter case the amplification of the translated signals can be adjusted, if desired automatically depending upon the position of switch 23. Similarly.
- tube IS with tube screen [4, or tube 36 with tube screen 3! can be arranged at adjustable distance from screen 38, or lens system 42 in Fig. 2 can be adjustably arranged as to position or focal length (magnification)
- intelligence comprises any information capable of being visibly reproduced, including, but not by way of limitation, living or inanimate objects and settings, physical phenomena, pictures, images, writings and printed matter.
- device for visibly reproducing electric signal impulses representative of intelligence includes any apparatus including a screen the self-luminescent, or light-reflecting or transmitting optical qualities of which are locally and temporarily changed by suitable radiant energy (such as cathode rays, X-rays, and radium rays) which in turn is controlled by electric signal im pulses representative of intelligence.
- light rays includes rays of light within the Visible, invisible and nearly visible spectral regions of light, including the visible light spectrum and the short and long wave light ray ranges near the end of that spectrum, such as ultra-violet and infra-red rays, which are capable of being visibly reproduced on a suitable viewing screen or to aifect a properly sensitized pick-up signal plate.
- a unitary two-way communication apparatus for picking up intelligence to be transmitted to a distant place and for visibly reproducing intelligence received from a distant place, essentially comprising, in combination, a pick-up and transmitting device adapted to transform light rays within the visible and invisible spectral regions and representative of intelligence to be transmitted', into electric signal impulses, means for translating said impulses upon outgoing transmitter means, a device for visibly reproducing electric signal impulses representative of intelligence, means for translating incoming signal impulses upon said reproducing device, and means for cperatively connecting said translating means either with outgoing and incoming transmitter means or with one another, so that in the latter case impulses produced in said pick-up device are visibly reproduced by said reproducing device.
- a unitary two-way communication apparatim for picking up intelligence to be transmitted to a distant place and for visibly reproducing intelligence received from a distant place essentially comprising, in combination, a pick-up and transmitting device adapted to transform light rays within the visible and invisible spectral regions and representative of intelligence to be transmitted into electric signal impulses, translating means including amplifying means for aid impulses upon outgoing transmitter means, a device for visibly reproducing electric signal impulses representative of intelligence, translating means including amplifying means of incoming signal impulses from incoming receiving means upon said reproducing device, and means for operatively connecting said translating means with one another so that impulses produced in said pick-up device are visibly reproduced in said reproducing device and disconnecting them at least from said incoming receiving means.
- a unit comprising a transmission pick-up device of light rays representative of intelligence. and a device for visibly reproducing electric signal impulses representative of intelligence, essentially comprising, in combination, saidpick-up transmission device, said reproducing device and optical means for dividing light rays as exempliiied by asemi-transparent mirror, said pick-up device and reproducing device in angular relation witlrrespect to said optical-means so that light rays representativeof intelligence projected in one direction upon said optical means are transmitted onto said pick-up device and light rays emerging from said reproducing device and projected upon said optical means are transmitted in opposite direction and the optical axes of said directions essentially coincide, means for translating signal impulses produced in said pick-up device upon transmitter means, means for translating impulses representative of intelligence from receiving means upon said reproducing device, and means for operatively connecting said pick-up device and reproducing device with one another and disconnecting at least the latter from said receiving means, so that signals reproduced in said pick-up device are visibly reproduced by said reproducing
- a unit comprising a transmission pick-up device of light rays representative of intelligence and a device for visibly reproducing electric signal impulses representative of intelligence, essen tially comprising, in combination, in enclosed space said pick-up transmission device, said reproducing device and optical means for dividing light rays as exemplified by a semi-transparent mirror.
- an observation aperture in the enclosure of said space, said pick-up device and reproducing device in angular relation with respect to said optical means and the latter arranged with respect to said aperture so that light raysrepresentative of intelligence projected in one direction through said aperture upon said optical means are transmitted onto said pick-up device and light rays emerging from said reproducing 2 device and projected upon said optical means are f:
- a unit comprising a transmission pick-up device of light rays representative of intelligence 2' and a device for visibly reproducing electric signal impulses representative of intelligence, essentially comprising, in combination, said pick-up transmission device, said reproducing device and optical means for dividing light rays as exemplified by a semi-transparent mirror, said pick-up device and reproducing device in angular relation with respect to said optical means so thatlight rays representative of intelligence projected in one direction upon said optical means are transmitted onto said pick-up device and light rays impulses produced in said pick-up device upon transmitter means, means for translating impulses representative of intelligence from receiving means upon said reproducing device, and
- a unitary apparatus for television transmission and reception essentially comprising, in combination,;.; a',television pick-up and picture signal transmitting'devlce, means for translating said signals upon outgoing transmitter means, a device for visibly reproducing picture signals, means for translating incoming picture signals from receiving means upon said reproducing device, adjustable optical means for projecting and focusing-an image to be televised onto said pickup device, and means for operatively connecting said pick-up device with said reproducing device and disconnecting the latter from said receiving means, so that picture signals produced in said pick-up device are visibly reproduced by said reproducing device.
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Optical Communication System (AREA)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR914843D FR914843A (xx) | 1944-06-20 | ||
US541155A US2420198A (en) | 1944-06-20 | 1944-06-20 | Two-way television communication unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US541155A US2420198A (en) | 1944-06-20 | 1944-06-20 | Two-way television communication unit |
Publications (1)
Publication Number | Publication Date |
---|---|
US2420198A true US2420198A (en) | 1947-05-06 |
Family
ID=24158400
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US541155A Expired - Lifetime US2420198A (en) | 1944-06-20 | 1944-06-20 | Two-way television communication unit |
Country Status (2)
Country | Link |
---|---|
US (1) | US2420198A (xx) |
FR (1) | FR914843A (xx) |
Cited By (39)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2504949A (en) * | 1946-01-19 | 1950-04-25 | Foufounis Jean Theodore | Self-view finder for photography |
US2525290A (en) * | 1946-12-17 | 1950-10-10 | Pye Ltd | View finder for television cameras |
US2526144A (en) * | 1947-07-04 | 1950-10-17 | Pye Ltd | View finder for television cameras |
US2537173A (en) * | 1948-02-19 | 1951-01-09 | Rauland Corp | Television intercommunication system |
US2601441A (en) * | 1949-11-12 | 1952-06-24 | Leonard Jean | Means for broadcasting television performances |
US2676243A (en) * | 1951-10-16 | 1954-04-20 | Myers Carmel | Television lighting apparatus |
US2698356A (en) * | 1951-10-17 | 1954-12-28 | Paul A Roos | Combined motion-picture and television camera |
US2704008A (en) * | 1951-04-06 | 1955-03-15 | Freeman H Owens | Prefocused slide and card holder for television projectors |
US2711667A (en) * | 1952-01-30 | 1955-06-28 | Reflectone Corp | Prompting device |
US2739257A (en) * | 1948-10-15 | 1956-03-20 | Sheldon Edward Emanuel | Device for x-ray motion pictures |
US2753758A (en) * | 1953-12-31 | 1956-07-10 | Joseph B Walker | Oblique image superimposition projection devices |
US2788390A (en) * | 1952-10-16 | 1957-04-09 | Sheldon Edward Emanuel | Device for examination of inaccessible parts |
US2796801A (en) * | 1955-12-05 | 1957-06-25 | Reflectone Corp | Prompting device |
US2845485A (en) * | 1952-11-13 | 1958-07-29 | Sheldon Edward Emanuel | Television camera for examination of internal structures |
US2883902A (en) * | 1954-10-14 | 1959-04-28 | Oppenheimer Jess | Prompting apparatus |
US2895005A (en) * | 1954-09-30 | 1959-07-14 | Bell Telephone Labor Inc | Two-way television over telephone lines |
US2909600A (en) * | 1956-07-26 | 1959-10-20 | Bell Telephone Labor Inc | Two-way television over telephone lines |
US2926559A (en) * | 1953-04-06 | 1960-03-01 | Jayo Corp | Prompting apparatus for cameras |
US2934601A (en) * | 1955-07-18 | 1960-04-26 | Oppenheimer Jess | Closed circuit television system and method of operation |
US2976356A (en) * | 1955-09-09 | 1961-03-21 | Thompson Ramo Wooldridge Inc | Slow sweep television system |
US3116365A (en) * | 1961-12-18 | 1963-12-31 | Bell Telephone Labor Inc | Alignment device |
US3482040A (en) * | 1966-02-11 | 1969-12-02 | John F Brinster | Image transmission system |
US3495908A (en) * | 1966-12-29 | 1970-02-17 | Clare H Rea | Visual telephone subscriber alignment apparatus |
US3723653A (en) * | 1967-10-24 | 1973-03-27 | Matsushita Electric Ind Co Ltd | Television telephone system |
US3755623A (en) * | 1970-10-22 | 1973-08-28 | Matra Engins | Combined television camera and a television receiver unit |
US3974337A (en) * | 1967-10-24 | 1976-08-10 | Matsushita Electric Industrial Co., Ltd. | FM television telephone system |
US4400725A (en) * | 1980-01-25 | 1983-08-23 | Suzuyo Tanigaki | Picture display-image pickup apparatus |
DE3431902A1 (de) * | 1984-08-30 | 1986-03-13 | Standard Elektrik Lorenz Ag, 7000 Stuttgart | Teilnehmergeraet fuer bildfernsprechen |
US4821307A (en) * | 1987-02-10 | 1989-04-11 | Flint Iii Paul L | Image splitter for two-way imaging apparatus |
US5142562A (en) * | 1987-09-25 | 1992-08-25 | Jacques Guichard | Sound and vision communications terminal including an auxiliary lighting device |
US5639151A (en) * | 1996-02-16 | 1997-06-17 | Mcnelley; Steve H. | Pass-through reflective projection display |
US20020105608A1 (en) * | 2000-12-06 | 2002-08-08 | Lazarev Pavel I. | Liquid crystal information displays |
US20050237382A1 (en) * | 2004-04-21 | 2005-10-27 | White Peter Mcduffie | Reflected backdrop for communications systems |
US7119829B2 (en) | 2003-07-31 | 2006-10-10 | Dreamworks Animation Llc | Virtual conference room |
US20080012936A1 (en) * | 2004-04-21 | 2008-01-17 | White Peter M | 3-D Displays and Telepresence Systems and Methods Therefore |
US7515174B1 (en) | 2004-12-06 | 2009-04-07 | Dreamworks Animation L.L.C. | Multi-user video conferencing with perspective correct eye-to-eye contact |
US20100238265A1 (en) * | 2004-04-21 | 2010-09-23 | Telepresence Technologies, Llc | Telepresence Systems and Methods Therefore |
US20110019056A1 (en) * | 2009-07-26 | 2011-01-27 | Massachusetts Institute Of Technology | Bi-Directional Screen |
US9628754B2 (en) | 2015-04-02 | 2017-04-18 | Telepresence Technologies, Llc | TelePresence architectural systems and methods therefore |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2621197B1 (fr) * | 1987-09-25 | 1993-08-20 | Guichard Jacques | Terminal de communication visuelle et sonore comportant un dispositif d'eclairage d'appoint |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1932253A (en) * | 1926-10-01 | 1933-10-24 | Bell Telephone Labor Inc | Television system |
US1980150A (en) * | 1931-03-04 | 1934-11-06 | Baird Television Ltd | Television and like apparatus |
US2308381A (en) * | 1939-12-29 | 1943-01-12 | Bell Telephone Labor Inc | Two-way television transmission |
US2315784A (en) * | 1941-11-25 | 1943-04-06 | Rca Corp | Electrical circuit |
-
0
- FR FR914843D patent/FR914843A/fr not_active Expired
-
1944
- 1944-06-20 US US541155A patent/US2420198A/en not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1932253A (en) * | 1926-10-01 | 1933-10-24 | Bell Telephone Labor Inc | Television system |
US1980150A (en) * | 1931-03-04 | 1934-11-06 | Baird Television Ltd | Television and like apparatus |
US2308381A (en) * | 1939-12-29 | 1943-01-12 | Bell Telephone Labor Inc | Two-way television transmission |
US2315784A (en) * | 1941-11-25 | 1943-04-06 | Rca Corp | Electrical circuit |
Cited By (51)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2504949A (en) * | 1946-01-19 | 1950-04-25 | Foufounis Jean Theodore | Self-view finder for photography |
US2525290A (en) * | 1946-12-17 | 1950-10-10 | Pye Ltd | View finder for television cameras |
US2526144A (en) * | 1947-07-04 | 1950-10-17 | Pye Ltd | View finder for television cameras |
US2537173A (en) * | 1948-02-19 | 1951-01-09 | Rauland Corp | Television intercommunication system |
US2739257A (en) * | 1948-10-15 | 1956-03-20 | Sheldon Edward Emanuel | Device for x-ray motion pictures |
US2601441A (en) * | 1949-11-12 | 1952-06-24 | Leonard Jean | Means for broadcasting television performances |
US2704008A (en) * | 1951-04-06 | 1955-03-15 | Freeman H Owens | Prefocused slide and card holder for television projectors |
US2676243A (en) * | 1951-10-16 | 1954-04-20 | Myers Carmel | Television lighting apparatus |
US2698356A (en) * | 1951-10-17 | 1954-12-28 | Paul A Roos | Combined motion-picture and television camera |
US2711667A (en) * | 1952-01-30 | 1955-06-28 | Reflectone Corp | Prompting device |
US2788390A (en) * | 1952-10-16 | 1957-04-09 | Sheldon Edward Emanuel | Device for examination of inaccessible parts |
US2845485A (en) * | 1952-11-13 | 1958-07-29 | Sheldon Edward Emanuel | Television camera for examination of internal structures |
US2926559A (en) * | 1953-04-06 | 1960-03-01 | Jayo Corp | Prompting apparatus for cameras |
US2753758A (en) * | 1953-12-31 | 1956-07-10 | Joseph B Walker | Oblique image superimposition projection devices |
US2895005A (en) * | 1954-09-30 | 1959-07-14 | Bell Telephone Labor Inc | Two-way television over telephone lines |
US2883902A (en) * | 1954-10-14 | 1959-04-28 | Oppenheimer Jess | Prompting apparatus |
US2934601A (en) * | 1955-07-18 | 1960-04-26 | Oppenheimer Jess | Closed circuit television system and method of operation |
US2976356A (en) * | 1955-09-09 | 1961-03-21 | Thompson Ramo Wooldridge Inc | Slow sweep television system |
US2796801A (en) * | 1955-12-05 | 1957-06-25 | Reflectone Corp | Prompting device |
US2909600A (en) * | 1956-07-26 | 1959-10-20 | Bell Telephone Labor Inc | Two-way television over telephone lines |
US3116365A (en) * | 1961-12-18 | 1963-12-31 | Bell Telephone Labor Inc | Alignment device |
US3482040A (en) * | 1966-02-11 | 1969-12-02 | John F Brinster | Image transmission system |
US3495908A (en) * | 1966-12-29 | 1970-02-17 | Clare H Rea | Visual telephone subscriber alignment apparatus |
US3974337A (en) * | 1967-10-24 | 1976-08-10 | Matsushita Electric Industrial Co., Ltd. | FM television telephone system |
US3723653A (en) * | 1967-10-24 | 1973-03-27 | Matsushita Electric Ind Co Ltd | Television telephone system |
US3755623A (en) * | 1970-10-22 | 1973-08-28 | Matra Engins | Combined television camera and a television receiver unit |
US4400725A (en) * | 1980-01-25 | 1983-08-23 | Suzuyo Tanigaki | Picture display-image pickup apparatus |
DE3431902A1 (de) * | 1984-08-30 | 1986-03-13 | Standard Elektrik Lorenz Ag, 7000 Stuttgart | Teilnehmergeraet fuer bildfernsprechen |
US4821307A (en) * | 1987-02-10 | 1989-04-11 | Flint Iii Paul L | Image splitter for two-way imaging apparatus |
US5142562A (en) * | 1987-09-25 | 1992-08-25 | Jacques Guichard | Sound and vision communications terminal including an auxiliary lighting device |
US5639151A (en) * | 1996-02-16 | 1997-06-17 | Mcnelley; Steve H. | Pass-through reflective projection display |
US20020105608A1 (en) * | 2000-12-06 | 2002-08-08 | Lazarev Pavel I. | Liquid crystal information displays |
US7119829B2 (en) | 2003-07-31 | 2006-10-10 | Dreamworks Animation Llc | Virtual conference room |
US8208007B2 (en) | 2004-04-21 | 2012-06-26 | Telepresence Technologies, Llc | 3-D displays and telepresence systems and methods therefore |
US20050237382A1 (en) * | 2004-04-21 | 2005-10-27 | White Peter Mcduffie | Reflected backdrop for communications systems |
US20080012936A1 (en) * | 2004-04-21 | 2008-01-17 | White Peter M | 3-D Displays and Telepresence Systems and Methods Therefore |
US9462223B2 (en) | 2004-04-21 | 2016-10-04 | Telepresence Technologies, Llc | Telepresence systems and methods therefore |
EP1751618A4 (en) * | 2004-04-21 | 2010-03-10 | Peter Mcduffie White | REFLECTED BACKGROUND FOR COMMUNICATION SYSTEMS |
US7760229B2 (en) | 2004-04-21 | 2010-07-20 | Telepresence Technologies, Llc | Reflected backdrop for communications systems |
US20100238265A1 (en) * | 2004-04-21 | 2010-09-23 | Telepresence Technologies, Llc | Telepresence Systems and Methods Therefore |
US20100253761A1 (en) * | 2004-04-21 | 2010-10-07 | Telepresence Technologies, Llc | Reflected Backdrop for Communications Systems |
US9065966B2 (en) | 2004-04-21 | 2015-06-23 | Telepresence Technologies, Llc | Telepresence systems and methods therefore |
EP1751618A2 (en) * | 2004-04-21 | 2007-02-14 | White, Peter McDuffie | Reflected backdrop for communications systems |
US8300785B2 (en) | 2004-04-21 | 2012-10-30 | Telepresence Technologies, Llc | Reflected backdrop for communications systems |
US8599239B2 (en) | 2004-04-21 | 2013-12-03 | Telepresence Technologies, Llc | Telepresence systems and methods therefore |
US8860778B2 (en) | 2004-04-21 | 2014-10-14 | Telepresence Technologies, Llc | 3-D displays and telepresence systems and methods therefore |
US7515174B1 (en) | 2004-12-06 | 2009-04-07 | Dreamworks Animation L.L.C. | Multi-user video conferencing with perspective correct eye-to-eye contact |
US8654234B2 (en) | 2009-07-26 | 2014-02-18 | Massachusetts Institute Of Technology | Bi-directional screen |
US20110019056A1 (en) * | 2009-07-26 | 2011-01-27 | Massachusetts Institute Of Technology | Bi-Directional Screen |
US9628754B2 (en) | 2015-04-02 | 2017-04-18 | Telepresence Technologies, Llc | TelePresence architectural systems and methods therefore |
US9800829B2 (en) | 2015-04-02 | 2017-10-24 | Telepresence Technologies, Llc | Architectural scale communications systems and methods therefore |
Also Published As
Publication number | Publication date |
---|---|
FR914843A (xx) | 1900-01-01 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US2420198A (en) | Two-way television communication unit | |
US3670097A (en) | Stereoscopic television system and apparatus | |
US3868173A (en) | Objective lens assembly for projection television | |
US3509344A (en) | Device with a night telescope | |
US3755623A (en) | Combined television camera and a television receiver unit | |
US3116365A (en) | Alignment device | |
US5027219A (en) | Apparatus and method for converting pictures or images into video signals | |
US6061182A (en) | Combiner for superimposing a display image on to an image of an external scene | |
US3852524A (en) | Stereoscopic television system | |
US3525807A (en) | Telephone-television substation apparatus | |
US2454144A (en) | Image projection system | |
US1870702A (en) | Television apparatus | |
GB923926A (en) | Improvements relating to optical observing instruments | |
US3539243A (en) | Optical system for day-night periscopic sight | |
US5742434A (en) | Adapter for extracting a portion of an image from an optical system or device | |
US1989317A (en) | Optical system | |
US4355329A (en) | Remote station | |
US2796801A (en) | Prompting device | |
US2349071A (en) | Method of and apparatus for producing images by television in stereoscopic relief | |
US2969428A (en) | Methods and apparatus for television montage | |
US2477331A (en) | Image projection lens and mirror system with spherical aberration correction means | |
US2296943A (en) | Optical system for television receivers | |
GB1389113A (en) | Optical focussing system | |
GB1433333A (en) | Optical viewing devices | |
GB2336444A (en) | Image forming apparatus with intermediate image surface |