Solar energy system with relay satellite

• US 4,305,555 A
• Filed: 10/20/1977
• Issued: 12/15/1981
• Est. Priority Date: 10/20/1977
• Status: Expired due to Term

• Current Assignee: Charles E. Davis
• Original Assignee: Charles E. Davis
• Inventors: Davis, Charles E.
• Primary Examiner(s): Barefoot, Galen L.
• Application Number:
  US05/843,834
• Time in Patent Office: 1,517 Days
• Field of Search: 244/158, 244/62, 244/159, 244/172, 244/173, 244/168, 60/641, 126/424, 126/417, 126/438, 126/439, 126/449, 250/212, 250/215, 350/293, 350/289, 350/299, 307/43, 307/149, 307/153, 310/4, 322/2 R, 325/4, 325/26, 325/37, 325/115, 343/915, 343/DIG. 2, 331/94, 331/94.5, 331/DIG. 1, 136/292, 290/1 R
• US Class Current: 244/172.7
• CPC Class Codes: B64G 1/428 Power distribution and management
• CPC Class Codes: B64G 1/4282 for transmitting power to earth or other spacecraft
• CPC Class Codes: B64G 1/44 using radiation, e.g. deployable solar arrays
• CPC Class Codes: Y10S 136/292 Space - satellite

Abstract

A system for beaming solar energy from space to an earth location and putting it to useful work either as heat or light energy, or by converting it into some other form of energy such as steam or electrical power. In the system illustrated, a receiver satellite is in polar orbit and a relay satellite is in equatorial orbit, rotating with the earth and therefore stationary with respect to earth location. Solar energy is collected by the receiver satellite through an array of parabolic collectors and focused by a series of mirrors onto a coherent radiation energy generator, preferably a laser beam generator. The laser beam is directed by a mirror to another mirror on the relay satellite which redirects it to a selected earth location. Alternatively, the relay satellite may convert the laser beam to a maser beam to better penetrate clouds, smoke and haze at the earth location. The mirrors on the two satellites are mounted on gimbals and are power-operated under continuous automatic telemetry control between the satellites and the ground to direct the laser or maser beam to the eath location. Provision is made on one of the satellites for modifying the beam through a constructive interference filter or a diffuser/expander lens, or both, to regulate the kind of energy and the area covered at the earth location.

Claims

1. A solar energy system comprising:

at least one receiver satellite in polar orbit having means for

converting solar energy to coherent radiation energy;

at least one relay satellite in equatorial orbit, stationary

relative to a selected earth location; and

means for transmitting said coherent radiation energy

from said receiver satellite to said earth location via said relay satellite.

2. A solar energy system according to claim 1 including means in said receiver satellite for converting solar energy to coherent radiation energy and transmitting said coherent radiation energy to said earth location via said relay satellite.

3. A solar energy system comprising:

at least one receiver satellite in polar orbit having means for converting solar energy to coherent radiation energy;

at least one relay satellite in equatorial orbit, stationary relative to a selected earth location; and

means for transmitting coherent radiation energy to said relay satellite in the form of a laser beam, said relay satellite having first energy transmitting means for redirecting said laser beam to said earth location and second energy transmitting means for converting said laser beam to a maser beam and transmitting same to said earth location, and means on said relay satellite for selectively activating said first and second energy transmitting means.

4. A solar energy system comprising at least one receiver satellite in polar orbit and at least one relay satellite in equatorial orbit stationary relative to a selected earth location;

said receiver satellite having a housing with an array of input parabolic collectors on a receiving face thereof, each of said collectors having an exit aperture and a mirror element at the focus thereof to direct solar radiation through the corresponding exit aperture, coherent radiation energy generating means in said housing effective in response to solar energy to generate a beam of coherent radiation energy, means within said housing for directing and concentrating all of the solar radiation from said exit apertures into an operative position simultaneously directed onto said coherent radiation generating means to generate a beam of coherent radiation energy and mirror means for directing said beam of coherent radiation energy toward said relay satellite;

said relay satellite having a housing with means including mirror means for receiving said beam of coherent radiation energy from said receiver satellite and transmitting a beam of coherent radiation energy to said earth location;

means at said earth location for converting the beam of coherent radiation energy so received into useful work;

solar power operated means on both satellites for adjusting the positions of both of said mirror means;

telemetry control means for said solar power operated means for directing said beam from the receiver satellite to the relay satellite and for directing said beam from said relay satellite to said earth location.

5. A solar energy system according to claim 4 in which said coherent radiation generating means comprises a plurality of individual coherent radiation generators, and means for moving said generators selectively into said operative position.

6. A solar energy system according to claim 4 in which filter means is provided on one of said satellites for modifying the frequency of the beam of coherent radiation energy transmitted therefrom.

7. A solar energy system according to claim 6 in which said filter means is located on the relay satellite.

8. A solar energy system according to claim 4 in which focusing and diffusing means is provided on one of said satellites for modifying the intensity and size of the beam of coherent radiation energy transmitted therefrom.

9. A solar energy system according to claim 8 in which said focusing and diffusing means is located on the relay satellite to modify the effect of said beam at said earth location.

10. A solar energy system according to claim 4 in which the beam of coherent radiation energy from the receiver satellite is a laser beam, said relay satellite has means for converting said laser beam to a maser beam, and the beam of coherent radiation energy from the relay satellite to the earth location is a maser beam.

11. A solar energy system according to claim 4 in which adjustment means is provided in the receiver satellite housing for selectively directing the solar radiation from said exit apertures away from said coherent radiation generator means and telemetry control means for actuating said adjustment means from the earth location.

12. A solar energy system according to claim 4 in which there is an earth receiver at said earth location, said earth receiver including power generating means for converting the beam of coherent radiation energy so received into another form of energy.