Abstract: A method of treating unwanted hair is disclosed. The method comprises: transmitting acoustic waves through the hair so as to generate heat at a follicle, a dermal papilla, a hair bulge and/or a germinal matrix of the hair. The heat itself is sufficient to damage or destroy the follicle, the dermal papilla, the hair bulge and/or the germinal matrix.

Abstract: An optical system for transmitting a stereoscopic image to a right eye and a left eye of a user is disclosed. The system comprises an optical relay device, having a light-transmissive substrate, an input grating, a left output grating and a right output grating. The optical relay device is designed and constructed such that light is diffracted by the input grating, propagates within the light-transmissive substrate via total internal reflection, and diffracted out of the light-transmissive substrate by at least one of the left and right output gratings. The system further comprises an image generating system, optically coupled to the input grating and configured for providing collimated light constituting a left-eye image and a right-eye image wherein the left-eye image is parallactically related to the right-eye image.

Abstract: An optical apparatus for transmitting light having a spectrum of wavelengths is disclosed. The apparatus comprises a plurality of optical devices design and constructed to decompose the light into a plurality of portions, respectively corresponding to different sub-spectra of the spectrum, such that each portion of the light is transmitted within a different optical device.

Abstract: An optical relay device, comprising a light-transmissive substrate shaped as a structure having an apex section, a right section and a left section being separated from the right section by an air gap. The optical relay device further comprises at least two input optical elements located at the apex section, a right output optical element located at the right section, and a left output optical element located at the left section. The substrate and the optical elements are designed and constructed such that light is redirected by the input optical elements, propagates via total internal reflection in the direction of at least one of the sections, and redirected out of the substrate by at least one output optical element.

Abstract: An optical relay device for transmitting light striking the optical relay device at a plurality of angles within a field-of-view is provided. The device comprises a light-transmissive substrate, an input optical element and an output optical element. The input element diffracts the light to propagate within the light-transmissive substrate via total internal reflection, and the output element diffracts the light out of the substrate. The output element is characterized by planar dimensions selected such that at least a portion of one or more outermost light rays within the field-of-view is directed to a two-dimensional region being at a predetermined distance from the substrate.

Abstract: A binocular device for transmitting an image into the eyes is provided. The binocular device comprises a first monocular device, for providing one eye with a first asymmetric field-of-view, and a second monocular device for providing another eye with a second asymmetric field-of-view, where the first and second asymmetric field-of-views are mutually complementary to a combined field-of-view, wider than each individual asymmetric field-of-view.

Abstract: A binocular device for transmitting an image into the eyes is provided. The binocular device comprises a first monocular device, for providing one eye with a first asymmetric field-of-view, and a second monocular device for providing another eye with a second asymmetric field-of-view, where the first and second asymmetric field-of-views are mutually complementary to a combined field-of-view, wider than each individual asymmetric field-of-view.

Abstract: A method of treating unwanted hair is disclosed. The method comprises: transmitting acoustic waves through the hair so as to generate heat at a follicle, a dermal papilla, a hair bulge and/or a germinal matrix of the hair. The heat itself is sufficient to damage or destroy the follicle, the dermal papilla, the hair bulge and/or the germinal matrix.

Abstract: An optical apparatus for transmitting light having a spectrum of wavelengths is disclosed. The apparatus comprises a plurality of optical devices design and constructed to decompose the light into a plurality of portions, respectively corresponding to different sub-spectra of the spectrum, such that each portion of the light is transmitted within a different optical device.

Abstract: A method for determining an acoustic velocity in a segment of a bone covered with a layer of soft tissue having an outer surface, which includes determining a first travel time of a first ultrasonic wave along a first path from the outer surface back to the outer surface which path includes at least a first part of the bone segment together with determining a second travel time of a second ultrasonic wave along a second path from the outer surface back to the outer surface, which path includes at least a second part of the bone segment and also determining a third travel time of a third ultrasonic wave along a third path from the outer surface back to the outer surface which path includes at least a third part of the bone segment, and deriving the acoustic velocity in the segment of bone from the three determined travel times.

Abstract: A method of determining an acoustic velocity in a bone, comprising: transmitting, from a location adjacent a first in-vivo bone, an acoustic wave having a wavelength about the same or smaller than a cross-section of the bone, which cross-section is perpendicular to a main travel direction of said acoustic wave in said bone; receiving said acoustic wave at a location adjacent a second in-vivo bone; and determining an acoustic velocity of at least a portion of at least one of the first and second bones, from a travel time of said wave through said first and second bones and at least one joint between said bones.

Abstract: A binocular device for transmitting an image into the eyes is provided. The binocular device comprises a first monocular device, for providing one eye with a first asymmetric field-of-view, and a second monocular device for providing another eye with a second asymmetric field-of-view, where the first and second asymmetric field-of-views are mutually complementary to a combined field-of-view, wider than each individual asymmetric field-of-view.

Abstract: A binocular device for transmitting an image into the eyes is provided. The binocular device comprises a first monocular device, for providing one eye with a first asymmetric field-of-view, and a second monocular device for providing another eye with a second asymmetric field-of-view, where the first and second asymmetric field-of-views are mutually complementary to a combined field-of-view, wider than each individual asymmetric field-of-view.

Abstract: A multi-layered image transfer blanket and a method of producing same, including a body portion and an image transfer portion, the image transfer portion having an image transfer surface and a back surface, comprising forming the image transfer portion on a carrier substrate and transferring the image transfer portion onto the body portion such that the back surface of the image transfer portion faces the body portion. Preferably, the image transfer portion is formed on the carrier substrate such that the back surface of the image transfer portion faces the carrier substrate.

Abstract: An optical switch including: (a) a light transmissive substrate, and (b) a two-dimensional array, disposed on the light transmissive substrate, the two-dimensional array having rows and columns of reflective shutter assembly elements, each of the reflective shutter assembly elements including: (i) a reflective shutter, and an output diffractive optical element.

Abstract: An optical device for enlarging an eye box, the optical device comprising: (a) a first optical expander being carried by, or formed in, a first light-transmissive substrate engaging a first plane; and (b) a second optical expander being carried by, or formed in, a second light-transmissive substrate engaging a second plane being spaced apart from the first plane. The first and the second optical expanders designed and configured such that light passing through the first optical expander is expanded in a first dimension, enters the second light-transmissive substrate through the second optical expander, and exits from the second light-transmissive substrate, expanded in a second dimension, hence enlarging an eye box of the optical device in both the first and the second dimensions.

Abstract: A diffractive optical element for guiding a light having a color spectrum characterized by a plurality of wavelengths longer than a shortest wavelength, &lgr;B, and shorter than a longest wavelength, &lgr;R, the light striking the diffractive optical element at an angle greater than a first field-of-view angle, &agr;−FOV, and smaller than a second field-of-view angle, &agr;+FOV. The diffractive optical element comprising a linear grating being formed in a light-transmissive substrate. The linear grating is characterized by a pitch, d, selected so as to allow total internal reflection of a light having wavelength of &lgr;B and a striking angle of &agr;−FOV. The light-transmissive substrate is characterized by an index of refraction, ns, larger than a minimal index of refraction, nMIN, which is selected so as to allow total internal reflection of a light having wavelength of &lgr;R and a striking angle of &agr;+FOV.

Abstract: An optical switch including: (a) a light transmissive substrate [42], and (b) a two-dimensional array, disposed on the light transmissive substrate, the two-dimensional array having rows and columns of reflective shutter assembly elements, each of the reflective shutter assembly elements including; (i) a reflective shutter [44], and an output diffractive optical element [54].

Abstract: A diffractive optical element for guiding a light having a color spectrum characterized by a plurality of wavelengths longer than a shortest wavelength, &lgr;B, and shorter than a longest wavelength, &lgr;R, the light striking the diffractive optical element at an angle greater than a first field-of-view angle, &agr;−FOV, and smaller than a second field-of-view angle, &agr;+FOV. The diffractive optical element comprising a linear grating being formed in a light-transmissive substrate. The linear grating is characterized by a pitch, d, selected so as to allow total internal reflection of a light having wavelength of &lgr;B and a striking angle of &agr;−FOV. The light-transmissive substrate is characterized by an index of refraction, ns, larger than a minimal index of refraction, nMIN, which is selected so as to allow total internal reflection of a light having wavelength of &lgr;R and a striking angle of &agr;+FOV.

Abstract: A method of printing a multi-page job including producing separate non-bit mapped files for each page of the multi-page job, producing a page file for each page of the multi-page job, storing the page files in a memory and printing the page files in sequence. The page file may include color separations for the various colors to be printed on the page or other convenient forms of storage devoted to a single page. The page file may be in a bit mapped format or may be in the form of a continuous tone image in a format which can be easily converted into a bit-map format by the printer during the printing process. Preferably, the continuous tone image can be converted into a bit map for printing on the fly.