Method of and apparatus for detecting range using multiple range readings

Claim 2

A ranging system for controlling photographic apparatus as a function of the range of different portions of a photographic scene, said system comprising: means for transmitting ranging energy along at least a path having different portions of a scene which are generally transverse to the direction of the ranging energy; means for sensing the presence or absence of ranging energy reflected from said different scene portions along said path; and, means responsive to said sensing means for facilitating determination of the range of said different scene portions.

Claim 3

A ranging system according to claim 1 wherein said determining means includes means for deriving a selected range signal as a function of the ranges of the different scene portions along said path for facilitating control of the photographic apparatus in accordance with said selected range signal.

Claim 4

The system of claim 2 wherein said transmitting means includes means for scanning a narrow beam of energy across a scene for facilitating determination of the range from said system of scene portions lying along a scanning path; and said sensing means includes means for receiving ranging energy reflected from said scene portions, said receiving means including an energy sensing position sensitive device extended in a direction generally parallel to said scanning path, and means for distributing such ranging energy along said device so that energy reflected from all scene portions substantially equidistant from said system are received at substantially the same location on said device while ranging energy from scene portions non-equidistant from said system are spatially distributed along said extended direction of said device, whereby the distance to any given scene portion which reflects energy is a function of the location of its reflected energy along the extended direction of said device.

Claim 5

The system of claim 3 wherein said distributing means includes a device lens mounted over said device for focusing the reflected energy on said array and means for providing relative movement in said extended direction between said device lens and said device in coordinated relation to scanning of said beam to produce said same location of received energy from scene portions equidistant from said system and said distributed locations of energy from non-equidistant scene portions.

Claim 6

The system of claim 4 wherein said means for providing relative movement comprises means coupling said device lens to said scanning means to coordinate the relative movement of said device lens with said scanning of said beam.

Claim 7

The system of claim 5 wherein said scanning means includes an energizeable source of energy, a source lens for facilitating focusing of said energy in said narrow beam, and said distributing means includes means for providing relative movement in the scanning direction between said source lens and said source so as to scan said beam across said scene, and means for coupling together said source lens and said device lens to coordinate the movement thereof.

Claim 8

The ranging system of claim 2 wherein said transmitting means includes a plurality of energizeable sources and at least a corresponding plurality of lenses, each of said lenses being positioned over a respective one of said sources so as to direct ranging energy from the respective one of said sources to a separate portion of the scene; and said sensing means includes a position sensitive device and a number of lenses corresponding to the lenses of said transmitting means, wherein each of said lenses of said sensing means is positioned over respective said devices; said sources and said lenses of said transmitting means and said lenses and said arrays of said sensing means being constructed and arranged so that ranging energy directed by any one of said sources is sensed solely by the respective one of said devices.

Claim 9

The system of claim 2 wherein said determining means includes means for controlling photographic functions of a photographic apparatus in accordance with said ranges.

Claim 10

The system of claim 8 wherein said determining means includes means for deriving a selected range signal as a function of the ranges of the different scene portions for facilitating control of said photographic function control means.

Claim 11

The system of claim 9 wherein said means for deriving a selected range signal is operable for deriving said signal as a function of the average of derived ranges of the different scene portions.

Claim 12

The system of claim 9 wherein said means for deriving a selected range signal is operable for deriving said signal as a function of the nearest object.

Claim 13

The system of claim 9 wherein said means for deriving a selected range signal is operable for deriving said signal as a function of the nearest large object.

Claim 14

The system of claim 9 wherein said means for deriving a selected range signal is operable for deriving said signal as a function of the farthest object.

Claim 15

The system of claim 9 wherein said means for deriving a selected range signal is operable for deriving said signal as a function of a weighted range signal derived from the ranges of the different scene portions.

Claim 16

The system of claim 14 wherein the weighted range signal is a compromise between the range of the nearest and farthest scene portions, but is weighted towards the nearest object.

Claim 17

The system of claim 14 wherein the weighted range signal is a compromise between the range of the nearest and farthest scene portions, but is weighted towards the farthest object.

Claim 18

The system of claim 14 wherein the weighted range signal is weighted in favor of preselected scene portions along the scanning path.

Claim 19

A ranging system for controlling photographic function of a photographic apparatus as a function of the range of different portions of a photographic scene, said system comprising: means for transmitting ranging energy across a path having different laterally adjacent portions of a scene therealong; means for sensing the presence or absence of ranging energy reflected from said different scene portions along said path; and, means responsive to said sensing means for determining the range of said different scene portions and for controlling photographic functions of a photographic apparatus in accordance with said ranges.

Claim 20

A ranging system for controlling photographic function of a photographic apparatus as a function of the range of different portions of a photographic scene, said system comprising: means for transmitting ranging energy across a path having different laterally adjacent portions of a scene therealong; means for sensing the presence or absence of ranging energy reflected from said different scene portions along said path; and, means responsive to said sensing means for determining the range of said different scene portions and for controlling photographic functions of a photographic apparatus in accordance with said ranges.

Claim 21

A ranging system comprising: means for scanning a narrow beam of energy across a scene for facilitating determination of the range from said system of scene portions lying along a scanning path; and, means for receiving ranging energy reflected from such scene portions, said receiving means including an energy sensing position sensitive device extended in a direction parallel to the scanning path, and means for distributing such ranging energy along said device so that energy reflected from all scene portions substantially equidistant from said system are received at substantially the same location on said device while ranging energy from scene portions non-equidistant from said system are spatially distributed along said extended direction of said device, whereby the distance to any given scene portion which reflects energy is a function of the location of its reflected energy along the extended direction of said device.

Claim 22

A ranging system comprising: means for scanning a narrow beam of energy across a scene for facilitating determination of the range from said system of scene portions lying along a scanning path; and, means for receiving ranging energy reflected from such scene portions, said receiving means including an energy sensing position sensitive device extended in a direction parallel to the scanning path, and means for distributing such ranging energy along said device so that energy reflected from all scene portions substantially equidistant from said system are received at substantially the same location on said device while ranging energy from scene portions non-equidistant from said system are spatially distributed along said extended direction of said device, whereby the distance to any given scene portion which reflects energy is a function of the location of its reflected energy along the extended direction of said device.

Claim 23

The system of claim 19 wherein said distributing means includes a device lens mounted over said device for focusing the reflected energy on said device and means for providing relative movement in said extended direction between said device lens and said device in coordinated relation to scanning of said beam to produce said same location of received energy from scene portions equidistant from said system and said distributed locations of energy from non-equidistant scene portions.

Claim 24

The system of claim 19 wherein said means for providing relative movement comprises means coupling said device lens to said scanning means to coordinate the relative movement of said device lens with said scanning of said beam.

Claim 25

The system of claim 20 wherein said scanning means includes an energizeable source of energy, a source lens for facilitating focusing of said energy in said narrow beam, and said distributing means includes means for providing relative movement in the scanning direction between said source lens and said source so as to scan said beam across said scene, and means for coupling together said source lens and said device lens to coordinate the movement thereof.

Claim 26

The system of claim 20 wherein said scanning means includes a source lens mounted over said source and being movable relative to said source so as to effect said scanning, said source lens being generally synchronously movable with said device lens so that reflected beam energy from the different scene portions strike said device in locations which are a function of the distance the reflected pulses travel whereby scene portions equidistant from said system are substantially coincidental on said device.

Claim 29

The method of claim 24 including the step of deriving a selected range signal as a function of the scene portion ranges for facilitating control of a photographic apparatus.

Claim 32

The method of claim 26 including the step of deriving a selected range signal as a function of the scene portion ranges for facilitating control of a photographic apparatus.

Claim 33

The method of claim 26 wherein said deriving step includes selecting a range signal as a function of the average of the derived ranges of different scene portions.

Claim 34

The method of claim 27 wherein said selected range signal is a function of a weighted average of the derived ranges of the different scene portions.

Claim 35

The method of claim 26 wherein said deriving step includes selecting a range signal as a function of the nearest object.

Claim 36

The method of claim 27 wherein said selected range signal is a function of the nearest large scene object.

Claim 37

The method of claim 27 wherein said selected range signal is a function of the farthest object.

Claim 38

The method of claim 27 wherein said selected range signal is a compromise between the range of the nearest and farthest scene portions, but is weighted towards the nearest object.

Claim 39

The method of claim 27 wherein said selected range signal is a compromise between the range of the nearest and farthest scene portions, but is weighted towards the farthest object.

Claim 40

The method of claim 27 wherein said selected range signal is weighted in favor of preselected scene portions along the scanning path.

Claim 43

The method of claim 36 wherein said distributing step includes: focusing the reflected energy on the array by means of a lens mounted over the device; and, providing relative movement between the lens and the device in coordinated relation to scanning of the beam to produce the same location of energy from scene portions equidistant from the system and distributed location of the energy from non-equidistant scene portions.

Claim 44

The method of claim 37 wherein said scanning step includes: energizing a source of radiant energy; focusing of said energy in a narrow beam by a lens assembly; relatively moving the source and the lens so as to scan the beam across the scene; and, coupling the scanning step and the distributing step to coordinate relative movement thereof so as to produce the same location of energy from scene portions equidistant from the system and distributed location of the energy from non-equidistant scene portions.