Recording holograms of objects with range contours

Claim 2

Apparatus for recording holograms of an object to be recorded and having range contours thereon, said apparatus comprising: a. a first laser including a first ruby rod; b. a first light source for pumping said first ruby rod; c. first means for causing said first laser to lase at a first predetermined frequency; d. a second laser including a second ruby rod; e. a second light source for pumping said second ruby rod; f. second means for causing said second laser to lase at a second predetermined frequency; g. a beam splitter for splitting the light from said lasers into a reference beam and a scene beam; h. light sensitive means disposed in a predetermined plane for recording a hologram of an object; i. first fixed optical means for directing said reference beam toward said light-sensitive means; and j. second optical means for directing said scene beam onto the object to be recorded and thence onto said light-sensitive means, the difference in frequency of said predetermined frequencies being such that range contours are produced on the object having a spacing of no less than about 0.1 millimeter and both said optical means being fixedly disposed relative to each other so that each of said reference beams and each of said scene beams from said lasers travels respectively along identical paths to said light-sensitive means.

Claim 3

Apparatus as defined in claim 1 wherein said first and second light source are energized simultaneously.

Claim 4

Apparatus as defined in claim 1 wherein said first and second light source are energized in sequence, whereby two separate exposures of the object may be taken, each at a different frequency.

Claim 5

Apparatus as defined in claim 1 wherein said first and second means maintains said first and said second ruby rod, each at a predetermined and different temperature.

Claim 6

Apparatus as claimed in claim 1 wherein said first ruby rod consists of pink ruby and said second ruby rod consists of dark ruby.

Claim 7

Holographic apparatus for recording holograms of objects covered with range contours of relatively small spacing comprising: a. a laser including a ruby rod capable of lasing at either a wavelength R1 or R2; b. a light source pumping said ruby rod; c. an optical cavity defined by a first light reflector capable of transmitting light from said laser and a second and a third light reflector, sad second light reflector reflecting substantially only light waves of a wavelength corresponding to R1, said third reflector reflecting substantially only light of a wavelength corresponding to R2; d. optical means for directing light at will either toward said second or said third mirror, thereby to cause said laser to lase either at a wavelength R1 or R2; e. a beam splitter for splitting the light from said laser into a reference and a scene beam; f. a light-sensitive medium disposed in a predetermined plane for recording a hologram; g. fixed means for directing said reference beam toward said light-sensitive medium; and h. means for directing said scene beam onto an object to be recorded and thence onto said light-sensitive medium, said means for directing said reference beam and said scene beam being fixedly disposed relative to each other so that said reference and scene beams of each wavelength travels respectively along identical paths to said light sensitive means, whereby successive holograms may be recorded in light corresponding to R1 and in light corresponding to R2 by selectively directing the light of said laser toward said second or said third light reflector, the difference in frequency of said wavelengths R1 and R2 being such that range contours of the object are produced on the hologram having a spacing of no less than about 0.1 millimeter.

Claim 8

Holographic apparatus for recording holograms of objects covered with range contours of relatively small spacing comprising: a. a laser including a ruby rod capable of lasing at either a wavelength R1 or R2; b. a light source pumping said ruby rod; c. an optical cavity defined by a first light reflector capable of transmitting light from said laser and a second and a third light reflector, sad second light reflector reflecting substantially only light waves of a wavelength corresponding to R1, said third reflector reflecting substantially only light of a wavelength corresponding to R2; d. optical means for directing light at will either toward said second or said third mirror, thereby to cause said laser to lase either at a wavelength R1 or R2; e. a beam splitter for splitting the light from said laser into a reference and a scene beam; f. a light-sensitive medium disposed in a predetermined plane for recording a hologram; g. fixed means for directing said reference beam toward said light-sensitive medium; and h. means for directing said scene beam onto an object to be recorded and thence onto said light-sensitive medium, said means for directing said reference beam and said scene beam being fixedly disposed relative to each other so that said reference and scene beams of each wavelength travels respectively along identical paths to said light sensitive means, whereby successive holograms may be recorded in light corresponding to R1 and in light corresponding to R2 by selectively directing the light of said laser toward said second or said third light reflector, the difference in frequency of said wavelengths R1 and R2 being such that range contours of the object are produced on the hologram having a spacing of no less than about 0.1 millimeter.

Claim 11

The method as defined in claim 7 wherein said ruby laser is maintained at two different predetermined temperatures for generating in succession said first and said second laser beam.

Claim 12

The method as defined in claim 7 wherein said ruby laser is successively operated at the transition R1 and at the transition R2 for generating said first and said second laser beam.

Claim 13

The method as defined in claim 7 wherein said first laser beam is generated by a first ruby laser including a pink ruby rod and said second laser beam is generated by a ruby laser having a dark ruby rod to develop the two laser beams at different frequencies.

Claim 14

The method as defined in claim 7 wherein said two laser beams are developed by two separate ruby lasers, each capable of generating a laser beam at a different predetermined frequency.

Claim 15

Apparatus for recording holograms of an object to be recorded and having range contours thereon, said apparatus comprising: a. laser means for generating a first laser beam having a first predetermined frequency and a second laser beam having a second predetermined frequency; b. means for splitting said laser beams into a reference beam and a scene beam; c. light-sensitive means disposed in a predetermined plane for recording a hologram of a fixed object; d. first optical means for directing said reference beam toward said light-sensitive means at a fixed angle; and e. second optical means for directing said scene beam onto the object and thence onto said light-sensitive means for recording reference and scene beams at both of said frequencies, the frequency difference of said predetermined frequencies being such that range contours produced on the object have a spacing of no less than about 0.1 millimeter both said optical means being fixedly disposed relative to each other so that each of said reference beams and each of said scene beams from said laser means travels respectively along identical paths to said light-sensitive medium.

Claim 16

Apparatus for recording holograms of an object to be recorded and having range contours thereon, said apparatus comprising: a. laser means for generating a first laser beam having a first predetermined frequency and a second laser beam having a second predetermined frequency; b. means for splitting said laser beams into a reference beam and a scene beam; c. light-sensitive means disposed in a predetermined plane for recording a hologram of a fixed object; d. first optical means for directing said reference beam toward said light-sensitive means at a fixed angle; and e. second optical means for directing said scene beam onto the object and thence onto said light-sensitive means for recording reference and scene beams at both of said frequencies, the frequency difference of said predetermined frequencies being such that range contours produced on the object have a spacing of no less than about 0.1 millimeter both said optical means being fixedly disposed relative to each other so that each of said reference beams and each of said scene beams from said laser means travels respectively along identical paths to said light-sensitive medium.

Claim 17

Apparatus as defined in claim 12 wherein said first and second laser beams are generated simultaneously.

Claim 18

Apparatus as defined in claim 12 wherein said first and second laser beams are generated in sequence.

Claim 21

The method as defined in claim 15 wherein said two laser beams are generated simultaneously.

Claim 22

The method as defined in claim 15 wherein said two laser beams are generated in sequence.