Abstract: A photographic element including a light sensitive silver halide emulsion layer having a dye precursor incorporated therein, wherein the dye precursor is capable of forming an infrared dye. A method of developing a latent image on an exposed photographic element is also provided.

Abstract: This invention relates to a method of forming an image comprising providing an imaging element comprising a transparent polymer sheet, and at least one photo sensitive dye forming coupler containing layer is on each side of said sheet, wherein there are at least four separate photo sensitive layers and the photo sensitive layers comprise at least four dye forming couplers that form at least four spectrally distinct colors, image wise exposing said imaging element by actinic radiation, developing an image, and applying a white reflective sheet to one side of the developed imaging element.

Abstract: Method for the production of a laser-inscribable sheet of glass, wherein a laser-sensitive coating, comprising a) a base polymer and b) a radiation-sensitive additive which exhibits a color change on laser irradiation, is applied to at least part of a sheet of glass and hardened, and the sheet of glass is subsequently inscribed by means of a laser.

Abstract: An image formation process of a silver halide color photographic light sensitive material is disclosed, rising coating a processing solution containing a color loping agent onto the exposed photographic material in a coating section to perform development, while supplying the processing solution to the coating section, wherein the processing solution has a viscosity of 10.1 to 15000 cp at 25° C. and the processing solution being supplied to the coating section at a supplying rate of 0.002 to 2.0 ml/sec.

Abstract: This invention relates to an imaging element comprising a transparent polymer sheet, and at least one photosensitive dye forming coupler containing layer is on each side of said sheet, wherein there are at least four separate photosensitive layers and the photosensitive layers comprise at least four dye forming couplers that form at least four spectrally distinct colors.

Abstract: The invention relates to a photographic element comprising a base material, at least one exposure side photosensitive silver halide layer, and at least one backside photosensitive silver halide layer, wherein said face side photosensitive layer has lower speed than said backside photosensitive layer, and wherein said base material has a percent transmission of between 35 and 60%.

Abstract: Novel co-developer compounds are useful in combination with hindered phenol developers to produce high contrast black-and-white photothermographic elements. The co-developer compounds have the formula wherein: Y is H, a metal (preferably, an alkali metal), or an alkyl group (preferably, an alkyl group having from 1 to 4 carbon atoms), and the solid curved line represents the atoms and bonds necessary to complete a ring structure (preferably a 5 or 6 membered ring structure). The photothermographic elements may be used as a photomask in a process where there is a subsequent exposure of an ultraviolet or short wavelength visible radiation-sensitive imageable medium.

Abstract: An image information recording method is disclosed.

Abstract: An image information recording method is disclosed. The method comprises the steps of imagewise exposed to light a silver halide photographic light-sensitive material comprising a support having thereon a light-sensitive layer comprising light-sensitive silver halide and a coupler, color developing the image wise exposed silver halide photographic light-sensitive material, converting the image information formed on the silver halide photographic light-sensitive material to electric information while the light-sensitive material is wetted without a drying and at least a part of developed silver is remained in the light-sensitive material, and recording the image information on another recording medium according as electric image information.

Abstract: This invention relates to a decorative package comprising a package having adhered thereto a label comprising a transparent polymer sheet, and at least one dye containing layer is on each side of said sheet, wherein there are at least four separate dye containing layers and the dye containing layers comprise at least four spectrally distinct colors.

Abstract: A thermal processing kiosk for processing thermal film provides multiple processing options for a user. The kiosk includes a user control in the form of a touchscreen to permit the user to enter processing instructions and/or information. The thermal kiosk is adapted to accept exposed film for processing and printing in accordance with the processing instructions. In one feature of the invention, a user can prepay for processing of the film at the time of purchase of the film. The pre-paid status can be provided on the film by a marker or identifier on the cassette or the film. This helps to simplify the user interaction at the kiosk when the user submits the exposed film to the kiosk for processing. In further features of the invention, the processing flow in the thermal kiosk can be adapted to provide for rapid processing and the kiosk can include a display to permit a user to preview images prior to printing.

Abstract: There is disclosed an image-forming method, which comprises: subjecting a color light-sensitive material to exposure, by using, at least, a first, second, and third light-emitting element whose peak wavelength of the light-emission spectrum is in a first wavelength region of 380 to 500 nm, a second wavelength region of 500 to 600 nm, and a third wavelength region of 600 to 740 nm, respectively, and subjecting the exposed color light-sensitive material to development processing, wherein the color light-sensitive material has, at least, spectral sensitivities in the from first to third wavelength regions. There is also disclosed organic light-emitting elements for use as light sources for exposure in the method. According to the method, digital color images exhibiting good color reproduction can be obtained by exposing a light-sensitive material according to image information and carrying out development processing.

Abstract: An image-forming method using an exposure head having plural beam light sources that correspond to each exposure point and that emit each light with the same wavelength, to subject to exposure a light-sensitive material provided at least with a light-sensitive silver halide emulsion and a binder on a support, which method comprises arranging M sets of the beam light sources in a sub-scanning direction, perpendicular to a main scanning direction, along which the exposure head is moved, at predetermined intervals, and allowing the light-sensitive material to move in the sub-scanning direction, in steps of a distance of (the length of the exposure head in the aligned direction)/N (N≧2), to carry out superposing exposure N times, with an exposure time per exposure being 10−3 sec or less, thereby forming M×N pixels per exposure head in every M sets of exposure point, to form an image, wherein the silver halide emulsion contains Ir, in an amount to be added of 10−7 to 10−10 mol per mol of

Abstract: A method for reproducing an image from a photoprint is disclosed. This aspect of the present invention comprises: providing a photoprint comprising an imaging media and a data storage medium; imaging the imaging media to produce an image on an image side of the media; encoding the data storage medium with data corresponding to the image; reading the data from the data storage medium corresponding to the image; and reproducing the image based on the data read from the data storage medium.

Abstract: Provided is a method for producing image using a photothermographic material in which the photothermographic material is exposed with a laser light using an image producing apparatus having a recording section and heat developing section, and then developed by heating, the photothermographic material containing elsewhere at least on one plane of the a support at least one kind of photosensitive silver halide, a non-photosensitive organic silver salt, a reducing agent for silver ion and a binder; characterized in that the photosensitive silver halide contains an iridium compound, and the image producing apparatus has an exposure corrective control means for correctively controlling exposure output according to a temperature profile of photothermographic material within the apparatus. This method can provide an image with a stable quality while not being affected by environmental conditions during the image production.

Abstract: An image recording medium is disclosed which comprising: an acid generating agent capable of generating an acid by the action of heat or an acid, which is represented by the following formula (1); and a compound of causing variation in the absorption region of from 360 to 900 nm by the intramolecular or intermolecular reaction triggered by the action of an acid: W1OP  (1) wherein W1 represents a residue of an acid represented by W1OH, and P represents an acid-sensitive substituent capable of splitting off at a temperature of 150° C. or less due to catalysis by W1OH.

Abstract: An image recording medium is disclosed which comprising: an acid generating agent capable of generating an acid by the action of heat or an acid, which is represented by the following formula (1); and a compound of causing variation in the absorption region of from 360 to 900 nm by the intramolecular or intermolecular reaction triggered by the action of an acid: W1OP  (1) wherein W1 represents a residue of an acid represented by W1OH, and P represents an acid-sensitive substituent capable of splitting off at a temperature of 150° C. or less due to catalysis by W1OH.

Abstract: The invention relates to A reflective base photographic element comprising a support material comprising a microvoided biaxially oriented polymer sheet having an upper surface L* of at least 93.5 and imaging layers wherein said imaging layers have an exposure range of between 125 to 0.5 when there is a Status A reflection density shoulder loss of no more than 8 percent as a function of the cyan record, wherein said photographic element has an exposure range of at least 125 nanoseconds to 0.5 seconds when there is a Status A reflection density shoulder loss of no more than 8 percent as a function of the magenta color record, wherein said photographic element has an exposure range of at least 125 nanoseconds to 0.5 seconds when there is a Status A reflection density shoulder loss of no more than 4 percent as a function of the yellow color record, and wherein said photographic element has a Status A reflection density minimum of less than 0.

Abstract: This invention relates to an imaging element comprising a translucent polymer sheet, and at least three photosensitive dye forming coupler containing layers on the face side of said sheet, wherein said at least three photosensitive forming coupler containing layers comprise a cyan dye forming layer comprising a cyan dye forming coupler in combination with a red sensitized photosensitive emulsion, a yellow dye forming layer comprising a yellow dye forming coupler in combination with a blue light sensitive photosensitive emulsion, a magenta dye forming layer comprising a magenta dye forming coupler and a green light sensitive photosensitive emulsion, and on the backside of said translucent polymer sheet at least one dye forming coupler that forms at least one dye that is spectrally distinct from the dyes on the face side of said translucent sheet.

Abstract: A method of variably exposing photosensitive material. A semiconductor wafer is provided. A first target region and a second target region are identified on the semiconductor wafer. Photosensitive material is provided on the semiconductor wafer. An illuminating system including a source of illumination is provided. A mask is provided between the source of illumination and the photosensitive material. The photosensitive material is illuminated through the mask with the illuminating system to provide in a single step of the illuminating system a first illumination dose to the first target region and a second illumination dose to the second target region. The first illumination dose differs from the second illumination dose. No further illumination dose is provided to equalize the first illumination dose and the second illumination dose.

Abstract: A method is disclosed for electronically processing an image scanned from a scene exposed onto a color negative photographic element. The element is especially capable of producing images that, when scanned, converted to electronic form, corrected and then converted to a viewable form, exhibit excellent color, reduced granularity and improved sharpness. The photographic elements contain blue, green and red recording layer units capable of forming spectrally differentiated dye images. The layer units are substantially free of colored masking coupler, and each exhibit a dye image gamma of less than 1.5. The element exhibits an exposure latitude of at least 2.7 log E. The gamma ratios of the blue, green and red recording layer units are between 0.80 and 1.2. A method for producing a viewable image is additionally disclosed.

Abstract: This invention concerns a luminescent optical memory material and method of forming this material, including the encoding of information by a photographic process. The method involves the use of silver halide crystals of a defined size range, with the optional use of sensitizers, emulsion stabilizers, and other agents followed by the absorption of luminescent dyes on the developed silver particle to form a luminescent optical memory system. The method involves synthesis of a photographic emulsion with silver halide crystals of a defined size range, applying photographic emulsion to a substrate, exposing to light photochemical treatment and a process of transformation of the silver particles formed in the places exposed by light into luminescent particles. The method involves obtaining a multi-layer luminescent material for a three-dimensional optical memory devices.

Abstract: Disclosed is an image-forming method which comprises exposing a photographic material comprising a support having thereon at least a photosensitive silver halide emulsion and a binder, the silver halide emulsion containing at least one compound selected from metal ions and metal complex ions which are electron traps of 0.2 eV or less in depth, with an exposing head having at least three kinds of exposure light sources having different specific light emitting wavelength regions corresponding to at least three different color sensitivities of the photographic material, each of the at least three kinds of exposure light sources having different center-of-gravity wavelengths in each of the specific light emitting wavelength regions, wherein each of the specific light emitting wavelength regions is from the shortest wavelength to the longest wavelength among the exposure light sources having different center-of-gravity wavelengths, and the photographic material has a sensitivity variation of 0.

Abstract: A process for the preparation of a radiation-sensitive silver halide emulsion comprised of high chloride cubical host grains containing from 0.

Abstract: A method of forming a mark on a molding, which includes the steps of: (a)feeding a film having a first surface and a second surface (b) disposing a paint containing a paint component on the first surface of the film, where the paint has a lower melting point than the film, (c) positioning the film on the surface of a molding so that the paint contacts the surface of the molding, and (d) forming a mark by emitting an energy ray from the second surface side of the film, and transferring and disposing the paint positioned on the first surface of the illuminated portion on the surface of the molding, thereby forming a mark. The molding is a resin molding formed of a material containing resin. In this constitution, a mark with a desired color can be formed on a molding. The mark is formed easily and inexpensively. A mark having an excellent wear resistance is formed. A mark having an excellent precision is easily formed on the surface of a molding having a complicated shape.

Abstract: A color light sensitive material can be rapidly processed and is suitable for both surface exposure and high intensity scanning exposure. The exposed light sensitive material has excellent sharpness and residual color. The silver halide color photographic light sensitive material has on a support at least one silver halide emulsion layer containing a yellow dye forming coupler, at least one silver halide emulsion layer containing a magenta dye forming coupler, and at least one silver halide emulsion layer containing a cyan dye forming coupler. The characteristic colors of yellow, magenta and cyan are obtained using exposures according to a logarithmic relationship.

Abstract: This invention relates to packaged photographic film that is capable of being alternately processed, according to individual consumer choice, by either (1) a traditional wet-chemistry process with a phenylenediamine-containing developer solution followed by desilvering in one or more subsequent solutions to obtain a color negative film, or (2) a thermal process involving the use of a relatively minor amount of an aqueous solution containing a liberating agent such as alkaline base to activate (unblock) a blocked phenylenediamine developing agent located within the photographic element, followed by electronic scanning of the developed film without desilvering. This invention enables a single film stock to be developed in both a conventional deep tank process and in an apparently dry process.

Abstract: The image forming method comprising the steps of subjecting a silver halide photographic light-sensitive material comprising an yellow image forming layer, a magenta image forming layer and a cyan image forming layer to scanning exposure with a light beam so that an exposure time is not more than 10−13 second per pixel, and developing the photographic material by a color developer, wherein the maximum exposure amount (Emax) is controlled by an output of a calibration patch, and a difference between the logarithm of the exposure amount necessary to give a density of 0.3 and the logarithm of Emax is within the range of from 0.35 to 0.6 in each of the yellow, magenta and cyan image forming layers.

Abstract: An image forming method is disclosed, wherein a photographic element comprising a support having on at least one side thereof at least a photographic component layer containing light sensitive silver halide is subjected to exposure and photographic processing to form a dye image, in which the photographic processing is allowed to be completed, while the residual silver content in the photographic element is 5% or more; image information in the visible light wavelength region, in which the dye image has absorption, and image information in the invisible light wavelength region are read, and the obtained image information is further subjected to image processing to reduce noise due to the residual silver.

Abstract: High performance radiographic films exhibit visually adaptive contrast when imaged in radiographic imaging assemblies comprising an intensifying screen on both sides. These films have at least two silver halide emulsions (preferably tabular grains) on each side of a film support, and the emulsion closest to the film support on each side includes chemistry to control crossover. In addition, the films can be rapidly processed to provide the desired image whereby the upper scale contrast is at least 1.2 times the lower scale contrast. Thus, dense objects can be better seen at the higher densities of the radiographic image without any adverse sensitometric changes in the lower scale densities. These films have greater dynamic range that allows them to be scanned and digitized to correct for under- or over-exposure.

Abstract: Novel compositions for making structured color images and application thereof Compositions for making structured color images comprising (a) a soluble pigment precursor which can be transformed to an insoluble pigment by means of chemical, thermal, photolytic or radiation-induced method, and (b) a binder polymer or prepolymer, or a positive or negative resist-type resin which can be structured by crosslinking, polymerization or depolymerization by applying heat or electromagnetic irradiation. The compositions can be applied to optical and thermal recording, printing, and the production of color filters for Liquid Crystal Displays, with high accuracy, high transparency and high stability.

Abstract: An automatic labeler system for demarcating objects is disclosed. The system includes a device, such as for dispersing an optically responsive material onto the surface of each object. The material changes color in response to focused energy. The focused energy is provided by a device for optically demarcating the material by controllably directing focused energy, such as a laser, onto the optically responsive material. The system also includes a scanning device for scanning the surfaces of the objects with energy to determine the topology of the surfaces. The automatic labeler system is particularly useful in labeling stacked materials, such as individual boards in bundled lumber.

Abstract: Recovering the dye image on film in electronic film development following a latent holding stage obviates the problem common in prior art electronic film development of film image destruction. Recovery of the image is accomplished using a developing agent containing couplers to form a dye image. These dyes do not affect the infrared scans of the image. Upon complete development of the dye image, further dye formation is halted by the application of a coupler blocking agent, while silver development and electronic scanning may continue or halt. After halting dye formation, the film is stable for an arbitrary time in a latent stage and may be dried and stored. Following this latent stage, silver is removed from the film with a bleach-fix leaving a conventionally usable film image.

Abstract: The invention relates to a photographic member comprising at least one photosensitive silver halide layer on the top of said member and at least one photosensitive silver halide layer on the bottom of said member, a polymer sheet comprising at least one layer of voided polyester polymer and at least one layer comprising nonvoided polyester polymer, wherein the imaging member has a percent transmission of between 38 and 42%, the imaging member further comprises tints, and the nonvoided layer is at least twice as thick as the voided layer.

Abstract: A photographic member comprising a polymer sheet comprising at least one layer of voided polyester polymer and at least one layer comprising nonvoided polyester polymer, wherein the imaging member has a percent transmission of between 40 and 60%, the imaging member further comprises tints, and the nonvoided layer is at least twice as thick as the voided layer.

Abstract: The invention relates to a photographic element comprising a transparent polymer sheet, at least one image layer on the topside and one image layer on the bottom side wherein said polymer sheet has a stiffness of between 20 and 100 millinewtons, and said photographic element has a spectral transmission of at least 90% and a reflection density less than 10%.

Abstract: The invention relates to a photographic element comprising a transparent polymer sheet, at least one layer of biaxially oriented polyolefin sheet and at least one image layer wherein said polymer sheet has a stiffness of between 20 and 100 millinewtons, and said biaxially oriented polyolefin sheet has a spectral transmission of at least 90% and a reflection density less than 10%.

Abstract: A silver halide color photographic material is disclosed which comprises a support having provided thereon at least one silver halide emulsion layer containing a yellow dye-forming coupler, at least one silver halide emulsion layer containing a magenta dye-forming coupler, and at least one silver halide emulsion layer containing a cyan-dye forming coupler, wherein at least one of said at least one emulsion layers (i) contains silver chloride or silver chlorobromide emulsion grains having a silver chloride content of 95 mol % or more and substantially free of silver iodide, and (ii) has a ratio of point gamma I to point gamma II of 0.7 to 1.3, wherein when points giving densities of 1.0 and 1.5 on a characteristic curve obtained by an exposure time of 10.sup.-4 second are joined by a straight line, point gamma I is a point gamma on the characteristic curve, at a density which is 1.5 or more and which satisfies the condition where the value of logE on the characteristic curve is larger by 0.

Abstract: Compositions for making structured color images comprising(a) a soluble pigment precursor which can be transformed to an insoluble pigment by means of chemical, thermal, photolytic or radiation-induced method, and(b) a binder polymer or prepolymer, or a positive or negative resist-type resin which can be structured by crosslinking, polymerization or depolymerization by applying heat or electromagnetic irradiation.The compositions can be applied to optical and thermal recording, printing, and the production of color filters for Liquid Crystal Displays, with high accuracy, high transparency and high stability.

Abstract: A method for forming an image is disclosed. The method comprises the steps of exposing a photographic image forming medium by scanning by a light beam, and developing the photographic image forming medium to form an image,wherein the diameter and the intensity of light beam are controlled so that the diameter and the intensity satisfy the following relations (1), (2) and (3) within the range of the reflection optical density of an image to be formed after developing of from larger than 0.8 to 3.0;(1) the value of .alpha. is substantially the same as the value of .beta. when .alpha.=I.sub.d1 .times.D.sub.d1.sup.2 and .beta.=I'.sub.d1 .times.D.sub.0.8, and(2) D.sub.d1 <D.sub.0.8(3) (D.sub.d2 -D.sub.d1)/(d.sub.2 -.sub.1)<0wherein I.sub.d1 and D.sub.d1 are each intensity and diameter of light beam to form an image having relection optical density of d.sub.1 ; D.sub.0.8 is the diameter of light beam to form an image having density of 0.8; I'.sub.

Abstract: The invention relates to an photographic element comprising a transparent polymer sheet, at least one layer of biaxially oriented polyolefin sheet and at least one image layer, wherein said polymer sheet has a stiffness of between 20 and 100 millinewtons said biaxially oriented polyolefin sheet has a spectral transmission between 35% and 90%, said biaxially oriented polyolefin sheet has a reflection density less than 65%.

Abstract: The invention relates to a photographic element comprising a transparent polymer sheet, a biaxially oriented polyolefin sheet laminated to said transparent polymer sheet, one image layer coated on the top of said biaxially oriented polyolefin sheet and one image layer coated on the bottom of said transparent polymer sheet wherein said polymer sheet has a stiffness of between 20 and 100 millinewtons, and said biaxially oriented polyolefin sheet has a spectral transmission of at least 40% and a reflection density less than 60%.

Abstract: A method for developing a silver halide photographic light-sensitive material, wherein a silver halide photographic light-sensitive material containing at least three mosaic-like or stripe-like filter layers having different spectral transmission characteristics and at least one silver halide emulsion layer is exposed, thereafter said silver halide photographic light-sensitive material is processed by coating a processing solution or spraying a processing solution which consists of a developer containing at least one developing agent.

Abstract: Disclosed is a method of image formation comprising the steps of: (i) subjecting a silver halide color photographic material to scanning exposure with a beam modulated in accordance with image information to prepare a scanning-exposed photographic material, wherein the silver halide color photographic material comprises a support having provided thereon a photographic constituent layer containing at least one reducing agent for color formation represented by formula (I) and at least one dye-forming coupler, and wherein a scanning pitch of the beam is smaller than an effective beam diameter of the beam, and an inter-raster overlap width of the beam is from 5% to 95% of the effective beam diameter; and (ii) developing the scanning-exposed photographic material:R.sup.11 --NHNH--X--R.sup.12 (I)wherein R.sup.11 represents an aryl group or a heterocyclic group; R.sup.12 represents an alkyl group, an alkenyl group, an alkinyl group, an aryl group or a heterocyclic group; X represents --SO.sub.

Abstract: A silver halide color photographic film element and more particularly a color motion picture projection film element is provided comprising a transparent thermoplastic film support having a subbing layer unit, coated thereon at least one color forming hydrophilic layer and protective layer, characterized in that at least said subbing layer unit comprises at least one light-stabilizer, preferably absorbing ultraviolet radiation, and at least one chemical compound having reducing properties.

Abstract: The invention provides molded, extruded or formed phosphorescent plastic articles having laser marked indicia and methods for preparing the articles. The indicia may be seen as a contrast against a phosphorescent background or, alternatively, the indicia may themselves be phosphorescent. An article of the invention has a composition comprising about 50% to about 99% by weight of a thermoplastic or thermosetting resin, about 1% to about 50% by weight of a phosphorescent phosphor pigment and about 0.001% to about 1% by weight of a laser energy absorbing additive. Resin compositions which themselves are laser energy absorbing do not require the additive; however, the addition of small quantities of the laser energy additive enhances the quality and contrast of the laser mark.

Abstract: One embodiment of the invention comprises a silver halide light sensitive photographic print element comprising a support bearing on one side thereof: a blue color sensitive record comprising at least one blue-sensitive silver halide emulsion yellow-image forming layer, a red color sensitive record comprising at least one red-sensitive silver halide emulsion cyan-image forming layer, and a green color sensitive record comprising at least one green-sensitive silver halide emulsion magenta-image forming layer; wherein the overall contrast (OC) of the green record is greater than 1.9, and the mid-scale contrast (MSC) of the green record is about 3.2 or more, wherein the parameters OC and MSC are as defined herein.

Abstract: A silver halide light sensitive photographic print element is disclosed comprising a support bearing on one side thereof: a blue color sensitive record comprising at least one blue-sensitive silver halide emulsion yellow-image forming layer, a red color sensitive record comprising at least one red-sensitive silver halide emulsion cyan-image forming layer, and a green color sensitive record comprising at least one green-sensitive silver halide emulsion magenta-image forming layer; wherein the overall contrast (OC) of the green record is greater than 1.9, the mid-scale contrast (MSC) of the green record is less than 3.2, and the upper-scale contrast (USC) of the green record is greater than 3.2, wherein the parameters OC, MSC and USC are as defined herein.

Abstract: A silver halide color photographic light-sensitive material comprising a support having thereon at least one silver halide emulsion layer containing a yellow coupler, at least one silver halide emulsion layer containing a magenta coupler and at least one silver halide emulsion layer containing a cyan coupler, wherein at least one of the silver halide emulsion layers contains (1) silver halide grains having a silver chloride content of 95 mol % or more and containing from 1.times.10.sup.-7 to 1.times.10.sup.-3 mol of iron ion per mol of the silver halide in a state wherein the concentration of iron ion which is present in a surface region of the silver halide grains which amounts to 50% or less of the grain volume is ten times or more as high as that of other region, and (2) a water-soluble compound represented by the following formula (I): ##STR1## the substituents are defined in the specificaton.

Abstract: When laser light is transmitted by or reflected by a diffuser onto an object being illuminated, the object is not evenly illuminated, but is speckled with large speckles.The invention uses a moving diffuser which reduces the sizes of the speckles when the object is visually observed, and eliminates the speckles when a photographic film or plate is located at the object position and records the laser light.