Claims
- 1. A portable TV telephone, comprising:an objective lens constructed and arranged to form an image of an object; an antenna constructed and arranged to transmit and receive at least one of an image signal representing said image of the object, a dial signal and a voice signal carried by radio waves; a display unit which displays at least a dial number and said image of the object; and a switch which operates responsive to at least the dial number, wherein said objective lens system includes a diffractive optical element configured to at least correct chromatic aberration produced by said objective lens system, wherein said objective lens system has a stop, wherein said diffractive optical element has a negative refractive power and wherein said diffractive optical element is disposed on an object side of said stop.
- 2. A portable TV telephone comprising:an objective lens system arranged to form an image of an object; an antenna constructed and arranged to transmit and receive at least one of an image signal representing said image of the object, a dial signal and a voice signal carried by radio waves; a display unit constructed and arranged to display at least a dial number and said image of the object; and a switch constructed and arranged to operate responsive to at least the dial number, wherein said objective lens system includes a diffractive optical element configured to at least correct chromatic aberration produced by said objective lens system, wherein said objective lens system comprises, in order from an object side, a first negative lens unit and a second positive lens unit, and wherein said first lens unit consists only of a negative lens element and said second lens unit consists only of a positive lens element.
- 3. A portable TV telephone comprising:an objective lens system arranged to form an image of an object; an antenna constructed and arranged to transmit and receive at least one of an image signal representing said image of the object, a dial signal and a voice signal carried by radio waves; a display unit constructed and arranged to display at least a dial number and said image of the object; and a switch constructed and arranged to operate responsive to at least the dial number, wherein said objective lens system includes a diffractive optical element configured to at least correct chromatic aberration produced by said objective lens system, wherein said objective lens system comprises, in order from an object side, a first negative lens unit and a second positive lens unit, and wherein said diffractive optical element is cemented to a surface of said first negative lens unit.
- 4. A portable TV telephone comprising:an objective lens system arranged to form an image of an object; an antenna constructed and arranged to transmit and receive at least one of an image signal representing said image of the object, a dial signal and a voice signal carried by radio waves; a display unit constructed and arranged to display at least a dial number and said image of the object; and a switch constructed and arranged to operate responsive to at least the dial number, wherein said objective lens system includes a diffractive optical element configured to at least correct chromatic aberration produced by said objective lens system, wherein said objective lens system comprises, in order from an object side, a first negative lens unit and a second positive lens unit, wherein said objective optical system comprises a stop which is disposed between said first negative lens unit and said second positive lens unit, and wherein said diffractive optical element is disposed on the object side of said stop.
- 5. The portable TV telephone according to claim 1, 2, 3 or 4, wherein said objective lens system is disposed on a surface on which said image display unit is disposed.
- 6. The portable TV telephone according to claim 1, 2, 3 or 4, wherein said objective lens system is disposed on a surface on which said switch is disposed.
Priority Claims (1)
Number |
Date |
Country |
Kind |
7-258220 |
Sep 1995 |
JP |
|
Parent Case Info
This is a division of application Ser. No. 09/455,362 filed Dec. 6, 1999, now U.S. Pat. No. 6,243,217, which is a divisional of application Ser. No. 08/713,069 filed Sep. 12, 1996, now U.S. Pat. No. 5,999,327, the entire contents of each being incorporated by reference.
US Referenced Citations (9)
Foreign Referenced Citations (3)
Number |
Date |
Country |
52-29238 |
Apr 1977 |
JP |
57-64207 |
Apr 1982 |
JP |
5-107471 |
Apr 1983 |
JP |