WO2010061884A1 - 光変調装置およびレーザ加工装置 - Google Patents
光変調装置およびレーザ加工装置 Download PDFInfo
- Publication number
- WO2010061884A1 WO2010061884A1 PCT/JP2009/069946 JP2009069946W WO2010061884A1 WO 2010061884 A1 WO2010061884 A1 WO 2010061884A1 JP 2009069946 W JP2009069946 W JP 2009069946W WO 2010061884 A1 WO2010061884 A1 WO 2010061884A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- light
- laser
- dielectric multilayer
- optical path
- multilayer mirror
- Prior art date
Links
Images
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
- G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
- G02B26/0816—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light by means of one or more reflecting elements
- G02B26/0833—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light by means of one or more reflecting elements the reflecting element being a micromechanical device, e.g. a MEMS mirror, DMD
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
- G02B5/28—Interference filters
- G02B5/285—Interference filters comprising deposited thin solid films
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B15/00—Special procedures for taking photographs; Apparatus therefor
- G03B15/02—Illuminating scene
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B15/00—Special procedures for taking photographs; Apparatus therefor
- G03B15/02—Illuminating scene
- G03B15/03—Combinations of cameras with lighting apparatus; Flash units
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B15/00—Special procedures for taking photographs; Apparatus therefor
- G03B15/02—Illuminating scene
- G03B15/03—Combinations of cameras with lighting apparatus; Flash units
- G03B15/05—Combinations of cameras with electronic flash apparatus; Electronic flash units
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3141—Constructional details thereof
- H04N9/315—Modulator illumination systems
- H04N9/3161—Modulator illumination systems using laser light sources
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F2203/00—Function characteristic
- G02F2203/02—Function characteristic reflective
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F2203/00—Function characteristic
- G02F2203/05—Function characteristic wavelength dependent
- G02F2203/055—Function characteristic wavelength dependent wavelength filtering
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F2203/00—Function characteristic
- G02F2203/12—Function characteristic spatial light modulator
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B2215/00—Special procedures for taking photographs; Apparatus therefor
- G03B2215/05—Combinations of cameras with electronic flash units
- G03B2215/0564—Combinations of cameras with electronic flash units characterised by the type of light source
- G03B2215/0567—Solid-state light source, e.g. LED, laser
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B2215/00—Special procedures for taking photographs; Apparatus therefor
- G03B2215/05—Combinations of cameras with electronic flash units
- G03B2215/0564—Combinations of cameras with electronic flash units characterised by the type of light source
- G03B2215/0571—With second light source
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B2215/00—Special procedures for taking photographs; Apparatus therefor
- G03B2215/05—Combinations of cameras with electronic flash units
- G03B2215/0589—Diffusors, filters or refraction means
- G03B2215/0592—Diffusors, filters or refraction means installed in front of light emitter
Definitions
- the present invention relates to a light modulation device and a laser processing device including a reflective spatial light modulator.
- Patent Document 1 describes an apparatus using a reflective spatial light modulator (SLM: Spatial Light Modulator).
- SLM Spatial Light Modulator
- two mirrors are arranged on a virtual reference line, and a reflective SLM is arranged at a position shifted in the vertical direction from the virtual reference line.
- the input light incident along the virtual reference line is reflected by one mirror and enters the SLM.
- This light is modulated by the SLM, reflected by the other mirror, and then output along the virtual reference line.
- the target part is irradiated with illumination light having a wavelength different from that of the laser light, and reflected light or scattered light (hereinafter referred to as observation light) generated at the target part due to the irradiation of the illumination light is received. To observe the site.
- the present invention has been made in view of the above-described problems, and an object of the present invention is to provide a light modulation device and a laser processing device capable of observing a target portion while maintaining the resolution and light amount of observation light.
- the light modulation device modulates and outputs laser light, and outputs illumination light having a wavelength different from that of the laser light on the same optical path as the modulated laser light.
- a light modulation device that receives laser light incident along a first optical path extending in a first direction from an obliquely forward direction and reflects the laser light while laser light is emitted for each of a plurality of pixels arranged two-dimensionally.
- a second spatial light modulator that is formed on a reflective spatial light modulator that modulates the illumination light and a translucent member that transmits illumination light and that is incident on the front surface from the spatial light modulator and intersects the first direction.
- a dielectric multilayer mirror for reflecting the illumination light incident on the back surface to the second optical path and receiving the illumination light and the laser light from the dielectric multilayer mirror, And a condensing lens for condensing laser light It is characterized in.
- the laser light is incident along the first optical path and reaches the reflective SLM. Then, after the laser beam is modulated by the reflective SLM, the laser beam reaches the dielectric multilayer mirror.
- the illumination light enters from the back side of the dielectric multilayer mirror and passes through the dielectric multilayer mirror. Both the laser light and the illumination light travel on the second optical path, and reach the target site of the object to be processed or the object to be observed after being condensed by the condenser lens. Further, the observation light obtained by reflection or scattering at the target site follows an optical path opposite to that of the illumination light described above.
- the illumination light and the observation light can be prevented from being modulated by the reflective SLM. Therefore, it is possible to observe the target site while maintaining the resolution and light quantity of the observation light.
- the light modulation device may be characterized in that the first optical path passes through the back side of the dielectric multilayer mirror.
- the first optical path passes through the front surface side of the dielectric multilayer mirror, and the first optical path and the second optical path when viewed from a third direction orthogonal to the first and second directions. And may intersect with each other.
- the light modulation device can be downsized as compared with the case where it passes through the back side. Furthermore, since the incident angle of the laser beam to the reflective SLM can be reduced, crosstalk between pixels can be reduced.
- a laser processing apparatus is a laser processing apparatus that processes a processing object by irradiating a laser beam with a focusing point inside the processing object, and a laser light source that emits laser light; , An illumination light source that emits illumination light having a wavelength different from that of the laser light, and laser light incident along the first optical path extending in the first direction is received obliquely from the front, and the two-dimensional A reflection type spatial light modulator that modulates laser light for each of a plurality of arranged pixels and a translucent member that transmits illumination light.
- a dielectric multilayer mirror that reflects the second light path extending in the second direction intersecting the direction 1 and transmits the illumination light incident on the back surface onto the second optical path; and from the dielectric multilayer mirror Receiving illumination light and laser light And characterized in that it comprises an internally condensed to condensing lenses of laser beam processing object.
- the laser light is modulated by the reflective SLM, and the modulated laser light is condensed on the processing site by the condensing lens. It becomes possible to raise.
- laser light is incident along the first optical path and reaches the reflection type SLM, as in the light modulation apparatus described above. Then, after the laser beam is modulated by the reflective SLM, the laser beam reaches the dielectric multilayer mirror.
- the illumination light enters from the back side of the dielectric multilayer mirror and passes through the dielectric multilayer mirror. Both the laser light and the illumination light travel on the second optical path, and reach the part to be processed of the object to be processed after being condensed by the condenser lens.
- the observation light obtained by reflection or scattering at the part to be processed follows an optical path opposite to the illumination light described above.
- the illumination light and the observation light can be prevented from being modulated by the reflective SLM, it is possible to observe the part to be processed while maintaining the resolution and the light amount of the observation light. .
- the laser processing apparatus may further include an imaging unit for imaging the observation light generated when the illumination light is reflected or scattered on the object to be processed.
- an imaging unit for imaging the observation light generated when the illumination light is reflected or scattered on the object to be processed.
- the imaging means images the observation light transmitted through the dielectric multilayer mirror along the second optical path. This eliminates the need to install an optical component for branching the observation light from other light (laser light and illumination light) on the second optical path, thereby reducing aberration caused by such an optical component. Can do.
- the light modulation device is formed on a light source unit that emits laser light and illumination light having different wavelengths on the same optical path, and a first light-transmissive member that transmits the illumination light.
- the first dielectric multilayer mirror that receives the laser light and the illumination light from the laser beam, reflects the laser light and transmits the illumination light, and receives the laser light from the first dielectric multilayer mirror from an obliquely forward direction.
- Reflective spatial light modulator that modulates laser light for each of a plurality of two-dimensionally arrayed pixels and the first light transmissive member or separately from the first light transmissive member
- the laser beam is formed on the second translucent member that transmits the illumination light, reflects the laser light received from the spatial light modulator, and reflects the illumination light received from the first dielectric multilayer mirror.
- a second dielectric multilayer mirror that transmits light on the same optical path, and Receiving the illumination light and the laser beam from the collector multilayer mirror, wherein the illumination light and the laser beam and a focusing lens for focusing.
- laser light and illumination light are input from the light source unit onto the same optical path, and then enter the first dielectric multilayer mirror.
- the laser light and the illumination light are branched, and only the laser light is incident on the reflective SLM.
- the laser light and the illumination light modulated by the reflection type SLM again travel on the same optical path by the second dielectric multilayer film mirror, and reach the target site of the processing target or the observation target.
- the observation light obtained by reflection or scattering at the target site follows an optical path opposite to that of the illumination light described above. That is, according to this light modulation device, since the illumination light and the observation light can be prevented from being modulated by the reflection type SLM, the target portion can be observed while maintaining the resolution and the light amount of the observation light.
- the first light transmissive member is formed of a prism
- the first dielectric multilayer mirror is formed on the first surface of the prism
- the second dielectric multilayer mirror is provided. Is formed on the second surface of the prism, and the illumination light may propagate through the prism from the first surface to reach the second surface.
- the light modulation device and the laser processing device According to the light modulation device and the laser processing device according to the present invention, it is possible to observe the target site while maintaining the resolution and light quantity of the observation light.
- FIG. 3 is a side sectional view of the light modulation device 101A taken along line III-III in FIG. A side view of the light modulation device 101A viewed from the direction opposite to the arrow direction of the III-III line is shown.
- FIG. 3 is an exploded perspective view showing an LCOS type structure as an example of a reflective SLM 107. It is an assembly drawing of the light modulation device 101A. (A) The positional relationship between the dielectric multilayer mirror 106 and the reflective SLM 107 in the first embodiment is shown.
- (B) The positional relationship between the dielectric multilayer mirror 106 and the reflective SLM 107 according to a modification is shown. It is a figure which shows the example of the moire (interference fringe) M in the reflection type SLM107. It is a figure which shows the structure of the light modulation apparatus 101B which concerns on 2nd Embodiment. It is a figure which shows the structure of 101 C of light modulation apparatuses which concern on 3rd Embodiment. It is a figure which shows the structure of 102 A of laser processing apparatuses which concern on 4th Embodiment. It is a figure which shows the structure of the laser processing apparatus 102B which concerns on 5th Embodiment.
- FIG. 3 is an exploded perspective view showing an LCOS type structure as an example of a reflective SLM 251; 2 is a plan view of an SLM module 202 having a prism 243, a reflective SLM 251 and a condenser lens 261.
- FIG. 17 is a side sectional view showing a section taken along line IV-IV of the SLM module 202 shown in FIG. 16.
- FIG. 17 is a side sectional view showing a section taken along line VV of the SLM module 202 shown in FIG. 16.
- tilting mechanism 134 ... circuit board, 135 ... cylindrical member, 137 ... main body, 191 ... object, A1, B1 ... First optical path, A2, B2 ... second optical path, La, Lr ... laser light, Li ... illumination light, Lo ... observation light.
- FIGS. 1 to 4 are diagrams showing a configuration of an optical modulation device 101A according to the first embodiment of the present invention.
- FIG. 1 shows a plan sectional view of the light modulation device 101A
- FIG. 2 shows a bottom view of the light modulation device 101A.
- 3 is a side sectional view of the light modulation device 101A along the line III-III in FIG. 1
- FIG. 4 is a cross-sectional view of the light modulation device 101A as viewed from the direction opposite to the arrow direction of the III-III line. It is a side view.
- FIGS. 1 to 4 show an XYZ orthogonal coordinate system.
- the light modulation device 101A of the present embodiment modulates and outputs laser light Lr (see FIG. 1) input from the outside, and modulates illumination light Li (see FIG. 1) having a wavelength different from that of the laser light Lr.
- This is an apparatus for outputting on the same optical path as the laser beam Lr. 1 to 4, a light modulation device 101A according to the present embodiment includes a housing 103, a dielectric multilayer mirror 106 and a reflective SLM 107 housed in the housing 103, and a side wall of the housing 103. And a condensing lens 109 attached thereto.
- the housing 103 has a substantially rectangular parallelepiped appearance.
- An opening 130 is formed in one side wall 103a of the pair of side walls 103a and 103b of the housing 103, and a condensing lens 109 is attached to the side wall 103a so as to close the opening 130.
- an opening 131 is provided in the other side wall 103b, and illumination light Li enters from the light source (not shown) through the opening 131. That is, the opening 131 is an opening that allows light having a wavelength different from that of the laser light to pass therethrough.
- an opening 132 is provided in one side wall 103c. From this opening 132, laser light Lr enters from a light source (not shown). The laser light Lr enters the housing 103 along a first optical path extending in the first direction (Y-axis direction in the present embodiment). On the other hand, the illumination light Li enters the housing 103 along an optical path extending in a second direction (the X-axis direction in the present embodiment) intersecting the first direction.
- the reflection-type SLM 107 receives the laser light Lr incident along the first optical path from the diagonally forward side, reflects the laser light Lr, and modulates the laser light Lr for each of the two-dimensionally arranged pixels. .
- the reflective SLM 107 is disposed in the housing 103 at a position near the side wall 103d facing the opening 132, and the laser light Lr passes through the front surface side of the dielectric multilayer mirror 106, which will be described later, to reflect the reflective SLM 107. Is incident on.
- the reflective SLM 107 is supported by the tilt mechanism 133.
- the tilt mechanism 133 is fixed to the housing 103 to adjust the angle of the reflective SLM 107 and supports the reflective SLM 107.
- the posture angle of the reflective SLM 107 is adjusted by the tilt mechanism 133 so as to reflect the laser light Lr toward a dielectric multilayer mirror 106 described later.
- a circuit board 134 for controlling the reflective SLM 107 is disposed between the tilt mechanism 133 and the side wall 103 d of the housing 103.
- the reflection type SLM 107 of the present embodiment is a phase modulation type, and has a structure described below, for example.
- FIG. 5 is an exploded perspective view showing a LCOS (Liquid Crystal on Silicon) type structure as an example of the reflective SLM 107.
- the reflective SLM 107 includes a silicon substrate 155, a plurality of pixel electrodes 156 provided on the silicon substrate 155, a mirror layer 157 provided on the pixel electrode 156, and a mirror layer 157.
- the liquid crystal layer 158 is disposed between the alignment films (between the pixel electrode 156 and the transparent electrode 159 in the drawing).
- the pixel electrode 156 has a plurality of electrode portions 156a arranged in a two-dimensional shape including a plurality of rows and a plurality of columns, and each pixel electrode portion 156a of the pixel electrode 156 and the transparent electrode 159 are formed of the reflective SLM 107. They are opposed to each other in the stacking direction.
- the laser light Lr sequentially passes through the glass plate 160 and the transparent electrode 159 from the outside and enters the liquid crystal layer 158, is reflected by the mirror layer 157, and is transparent from the liquid crystal layer 158.
- the electrode 159 and the glass plate 160 are sequentially transmitted and emitted to the outside.
- a voltage is applied to each of the transparent electrode 159 and the opposing pixel electrode portion 156a, and a portion of the liquid crystal layer 158 sandwiched between the pair of electrode portions 156a and 159 facing each other according to the voltage of the pixel electrode portion.
- the refractive index is changing.
- a phase shift occurs in a component in a predetermined direction orthogonal to the traveling direction of the laser light Lr, and the laser light Lr is shaped (phase modulated) for each pixel.
- the dielectric multilayer mirror 106 is formed on the plate surface of the plate-like translucent member 105.
- the translucent member 105 can transmit light having a wavelength including the illumination light Li (can transmit light having a wavelength different from that of the laser light), and communicates with the opening 131 in the side wall 103b of the housing 103. It is fixed on the inclined end surface of the cylindrical member 135 attached in this manner.
- the translucent member 105 reflects the member 135 so that the laser light Lr incident on the front surface of the dielectric multilayer mirror 106 from the reflective SLM 107 is reflected on the second optical path extending in the second direction (X-axis direction).
- the posture angle is defined by.
- the dielectric multilayer mirror 106 transmits the illumination light Li that has passed through the translucent member 105 and entered the back surface onto the same second optical path as the laser light Lr. That is, the dielectric multilayer mirror 106 can pass light having a wavelength different from that of the laser light. Accordingly, the laser light Lr and the illumination light Li travel on the same optical path from the dielectric multilayer mirror 106.
- the first laser light Lr incident on the reflective SLM 107 is shown.
- the optical path and the second optical path of the laser light Lr emitted from the dielectric multilayer mirror 106 intersect each other (in the present embodiment, orthogonal).
- the condenser lens 109 is disposed on the optical path (second optical path) of the laser light Lr and the illumination light Li emitted from the dielectric multilayer mirror 106.
- the condensing lens 109 condenses the laser light Lr output from the reflective SLM 107 and reflected by the dielectric multilayer mirror 106, and the illumination light Li transmitted through the dielectric multilayer mirror 106, and supplies the laser light Lr to the object.
- An image is formed at a target part 191 (part to be processed or observation part).
- the condensing lens 109 receives light (that is, observation light) generated by reflection / scattering of the illumination light Li on the object 191 and outputs the observation light toward the dielectric multilayer mirror 106.
- an infinite focus objective lens is preferably used as the condenser lens 109.
- FIG. 6 is an assembly diagram of the light modulation device 101A of the present embodiment.
- a main body 137 having the side walls 103 a and 103 b of the housing 103 is prepared. Both ends of the main body 137 in the Y-axis direction are open, and a side wall 103c is screwed to one end, and a side wall 103d is screwed to the other end.
- an opening 130 is formed in advance on the side wall 103a
- an opening 131 is formed in advance on the side wall 103b
- an opening 132 is formed in advance on the side wall 103c.
- the translucent member 105 having the dielectric multilayer mirror 106 formed on the plate surface is fixed on the inclined end surface of the cylindrical member 135 in advance.
- the cylindrical member 135 is fixed to the side wall 103b by screws so that the inner hole communicates with the opening 131 of the side wall 103b.
- the condensing lens 109 is fixed to the outer surface side of the side wall 103a so as to cover the opening 130 of the side wall 103a.
- the tilt mechanism 133 includes a base plate 133a, a plurality of spring members 133b, and a plurality of screw members 133c.
- the plate-like base plate 133a has a plurality of pillars protruding in the Y-axis direction to support the reflective SLM 107, and the pillars are long so as to support the reflective SLM 107 in an inclined state. Are different.
- the plurality of spring members 133b extend in the Y-axis direction, and one end thereof is engaged with the base plate 133a and the other end is engaged with the main body portion 137 of the housing 103, whereby the base plate 133a and the housing are The main body part 137 of 103 is attracted in the Y-axis direction.
- the plurality of screw members 133c are screwed into the peripheral edge portion of the base plate 133a and project into the gap between the base plate 133a and the main body portion 137, thereby defining the interval between the base plate 133a and the main body portion 137. Then, by individually adjusting the protrusion amounts of the plurality of screw members 133c, the inclination angle of the base plate 133a, that is, the inclination angle of the reflective SLM 107 is adjusted.
- the circuit board 134 is disposed between the tilt mechanism 133 and the side wall 103d.
- a plurality of pillars 134a are provided on the peripheral edge of the circuit board 134, and the plurality of pillars 134a are screwed to the inner surface side of the side wall 103d, whereby the circuit board 134 is fixed to the side wall 103d.
- the laser light Lr enters the reflection type SLM 107 after entering along the first optical path from a light source unit (not shown). Then, after the laser beam Lr is modulated by the reflective SLM 107, the modulated laser beam Lr reaches the dielectric multilayer mirror 106. On the other hand, the illumination light Li enters from the back side of the dielectric multilayer mirror 106 and passes through the dielectric multilayer mirror 106.
- Both the laser light Lr and the illumination light Li travel on the same optical path (second optical path), and are collected by the condenser lens 109 and reach the target portion of the target object 191 such as a processing target or an observation target. Further, the observation light obtained by reflection or scattering at the target site follows an optical path opposite to that of the illumination light Li described above. That is, the observation light is transmitted through the dielectric multilayer mirror 106 and the translucent member 105 and output from the opening 131, and is observed using an imaging device or the like.
- the illumination light Li and the observation light are transmitted through the dielectric multilayer mirror 106 and the translucent member 105 and do not enter the reflective SLM 107. That is, according to the light modulation device 101A, since the illumination light Li and the observation light can be prevented from being modulated by the reflective SLM 107, the target site can be observed while maintaining the resolution and the light amount of the observation light.
- FIG. 7A shows the positional relationship between the dielectric multilayer mirror 106 and the reflective SLM 107 in this embodiment. That is, the first optical path A1 of the laser beam Lr extending in the Y-axis direction passes through the front surface side of the dielectric multilayer mirror 106 and reaches the reflective SLM 107. In other words, the dielectric multilayer mirror 106 is located behind the first optical path A1. The reflective SLM 107 is slightly inclined rearward and reflects the laser light Lr toward the dielectric multilayer mirror 106.
- the dielectric multilayer mirror 106 reflects the laser beam Lr forward (that is, onto the second optical path A2 extending in the X-axis direction), the first optical path A1 and the second optical path A2 as viewed from the Z-axis direction. Will cross each other.
- FIG. 7B shows the positional relationship between the dielectric multilayer mirror 106 and the reflective SLM 107 according to a modification.
- the first optical path B1 passes through the back side of the dielectric multilayer mirror 106 and reaches the reflective SLM 107.
- the dielectric multilayer mirror 106 is located in front of the first optical path B1.
- the reflective SLM 107 is slightly inclined forward and reflects the laser light Lr toward the dielectric multilayer mirror 106. In such a configuration, the first optical path B1 and the second optical path B2 do not intersect each other when viewed from the Z-axis direction.
- any of the configurations shown in FIGS. 7A and 7B may be adopted, but the configuration shown in FIG. 7A is more preferable.
- the reason is as follows.
- the light modulation is compared with the case where it passes through the back side as shown in FIG. 7B.
- the apparatus 101A can be downsized. In the configuration of FIG. 7A, the distance from the first optical path A1 of the portion 106a of the dielectric multilayer mirror 106 farthest from the first optical path A1 can be made shorter than the configuration of FIG. 7B. It is.
- the incident angle ⁇ can be made smaller than in the configuration shown in FIG.
- the distance from the reflective SLM 107 of the portion 106b of the dielectric multilayer mirror 106 closest to the first optical path A1 can be made longer than that of the configuration of FIG.
- FIG. 8 is a diagram illustrating another configuration example of the reflective SLM.
- the reflective SLM 170 shown in FIG. 8 has a configuration in which MEMS (Micro Electro Mechanical Systems) is applied.
- the reflective SLM 170 includes a silicon substrate 171, a plurality of actuators 172 arranged two-dimensionally on the silicon substrate 171, and a plurality of reflecting portions 173 supported by the plurality of actuators 172.
- One set of actuators 172 and the reflection portion 173 constitute one pixel, and the phase of the laser light Lr changes according to the height of the reflection portion 173.
- the height of each reflecting portion 173 is controlled by individually controlling the voltage applied to each actuator 172, and phase modulation is performed for each pixel on the incident laser light Lr.
- FIG. 9 is a diagram illustrating a configuration of an optical modulation device 101B according to the second embodiment of the present invention.
- the configurations of the housing 103, the translucent member 105, the dielectric multilayer mirror 106, the reflective SLM 107, and the condenser lens 109 are the same as those of the light modulation device 101A of the first embodiment described above. It is.
- the light modulation device 101B of the present embodiment further includes an illumination light source 111, an observation unit 113, and a half mirror 115 in addition to the configuration of the light modulation device 101A of the first embodiment.
- the illumination light source 111 is a light source for emitting illumination light Li.
- a halogen lamp is preferably used as the illumination light source 111.
- the half mirror 115 is disposed between the illumination light source 111 and the translucent member 105.
- the half mirror 115 transmits the illumination light Li emitted from the illumination light source 111 toward the translucent member 105, and reflects the observation light Lo transmitted through the translucent member 105 toward the observation unit 113.
- the observation unit 113 includes, for example, a solid-state imaging device having a plurality of pixels that are two-dimensionally arranged.
- the observation light Lo that has arrived from the half mirror 115 is received by the imaging device, and an object 191 based on the observation light Lo is received. An image of the target part is acquired.
- the light modulation device 101B of the present embodiment includes the same configuration as the light modulation device 101A of the first embodiment described above, and the illumination light Li and the observation light Lo are the dielectric multilayer mirror 106 and the translucent member 105. And does not enter the reflective SLM 107. That is, according to the light modulation device 101B, since the illumination light Li and the observation light Lo can be prevented from being modulated by the reflective SLM 107, the target portion can be observed while maintaining the resolution and the light amount of the observation light Lo. Further, by providing the illumination light source 111, the observation unit 113, and the half mirror 115, the target site can be suitably observed.
- FIG. 10 is a diagram showing a configuration of an optical modulation device 101C according to the third embodiment of the present invention.
- the configuration of the housing 103, the translucent member 105, the dielectric multilayer mirror 106, the reflective SLM 107, and the condenser lens 109 is the same as that of the light modulation device 101A of the first embodiment described above. It is the same.
- the configurations of the illumination light source 111, the observation unit 113, and the half mirror 115 are the same as those of the light modulation device 101B of the second embodiment described above.
- the light modulation device 101C of this embodiment further includes a laser light source 117 and a dichroic mirror 119 in addition to the configuration of the light modulation device 101B of the second embodiment.
- the laser light source 117 is a light source for emitting laser light La having a wavelength different from that of the illumination light Li.
- the laser light La is light that is used as assist light for the laser light Lr that is modulated light or as illumination light different from the illumination light Li.
- the dichroic mirror 119 selectively reflects light of a specific wavelength and transmits light of other wavelengths. In other words, the dichroic mirror 119 reflects the laser light La emitted from the laser light source 117 and reaches the illumination light Li emitted from the illumination light source 111 and the observation light Lo arrived from the object 191. .
- the dichroic mirror 119 emits laser light La and illumination light Li having different wavelengths toward the translucent member 105 on the same optical path. Then, the laser light La and the illumination light Li follow the same optical path and reach the object
- the light modulation device 101C of this embodiment includes the same configuration as the light modulation device 101A of the first embodiment described above, and the illumination light Li and the observation light Lo are the dielectric multilayer mirror 106 and the translucent member 105. And does not enter the reflective SLM 107. That is, according to the light modulation device 101C, since the illumination light Li and the observation light Lo can be prevented from being modulated by the reflective SLM 107, the target portion can be observed while maintaining the resolution and the light amount of the observation light Lo. Further, by providing the laser light source 117 and the dichroic mirror 119, it is possible to more appropriately observe or process the target part.
- FIG. 11 is a diagram showing a configuration of a laser processing apparatus 102A according to the fourth embodiment of the present invention.
- the laser processing apparatus 102A according to the present embodiment modulates and outputs a laser beam Lr input from the outside, and processes the processing object by irradiating the laser beam Lr with the focusing point inside the processing object. It is a device to do.
- FIG. 11 shows an XYZ orthogonal coordinate system.
- the laser processing apparatus 102A of the present embodiment includes a laser light source 120, a reflective SLM 121, a dielectric multilayer mirror 122, an observation optical system 123, an AF (Auto-Focus) unit 124, a condenser lens 125, a reflection lens A mirror 126 and a dichroic mirror 127 are provided.
- the laser light source 120 is a light source that emits laser light Lr that is modulated light.
- the laser light Lr is incident on the reflective SLM 121 along the first optical path A1 extending in the first direction (X-axis direction in the present embodiment).
- the first optical path A1 passes through the front surface side of the dielectric multilayer mirror 122 as in the first embodiment.
- the reflection type SLM 121 receives the laser light Lr obliquely from the front and modulates the laser light Lr for each of a plurality of pixels arranged two-dimensionally while reflecting the laser light Lr.
- the reflective SLM 121 has the same configuration as the reflective SLM 107 shown in FIG. 5 or the reflective SLM 170 shown in FIG.
- the observation optical system 123 is a component for emitting the illumination light Li and acquiring an image of the observation light Lo generated by the reflection or scattering of the illumination light Li on the object to be processed.
- the observation optical system 123 includes an illumination light source such as a halogen lamp, and illumination light Li is emitted from the illumination light source.
- the observation optical system 123 includes an imaging unit such as a solid-state imaging device having a plurality of pixels that are two-dimensionally arranged. The observation optical system 123 receives the observation light Lo by the imaging device and is processed based on the observation light Lo. Acquire an image of a processed part of an object.
- the dielectric multilayer mirror 122 is formed on the plate surface of a plate-like translucent member. This translucent member can transmit light having a wavelength including the illumination light Li.
- the dielectric multilayer mirror 122 has a posture angle so that the laser light Lr incident on the front surface from the reflective SLM 107 is reflected on the second optical path A2 extending in the second direction (Y-axis direction in the present embodiment). Is stipulated.
- the dielectric multilayer mirror 122 transmits the illumination light Li that has passed through the translucent member and entered the back surface onto the second optical path A2 that is the same as the laser light Lr. Therefore, the laser light Lr and the illumination light Li travel on the same optical path from the dielectric multilayer mirror 122. Further, the observation light Lo passes through the dielectric multilayer mirror 122 along the second optical path A2.
- the observation optical system 123 images the observation light Lo that has passed through the dielectric multilayer mirror 122.
- the first laser light Lr incident on the reflective SLM 121 is shown.
- the optical path A1 and the second optical path A2 of the laser light Lr emitted from the dielectric multilayer mirror 122 intersect each other (orthogonal in the present embodiment).
- the laser light Lr and illumination light Li emitted from the dielectric multilayer mirror 122 are changed in their optical paths by the two reflecting mirrors 126, then pass through the dichroic mirror 127 and reach the condenser lens 125.
- the condensing lens 125 condenses the laser light Lr output from the reflective SLM 121 and reflected by the dielectric multilayer mirror 122 and the illumination light Li transmitted through the dielectric multilayer mirror 122 to process the laser light Lr. An image is formed at a part to be processed of the object. Further, the condenser lens 125 inputs the observation light Lo generated on the object to be processed, and outputs the observation light Lo to the dielectric multilayer mirror 122. As the condenser lens 125, an infinite focus objective lens is preferably used.
- the AF unit 124 is a component for accurately aligning the condensing point of the laser beam Lr at a predetermined distance from the surface even when undulation is present on the surface of the workpiece.
- the AF unit 124 emits the AF laser light Lb reflected by the dichroic mirror 127, detects the AF laser light Lb collected by the condenser lens 125 and reflected by the surface of the workpiece, For example, using the astigmatism method, displacement data of the surface of the workpiece is acquired.
- the AF unit 124 reciprocates the condensing lens 125 in the direction of the optical axis along the waviness of the surface of the processing object based on the acquired displacement data, and the focusing lens 125 and the processing object Fine-tune the distance.
- the laser beam Lr is modulated by the reflective SLM 121, and the modulated laser beam Lr is condensed on the processing site by the condenser lens 125, for example, aberration at the focal point. It is possible to improve the machining accuracy by correcting.
- this laser processing apparatus 102A has the following operations and effects, similar to the light modulation apparatus 101A of the first embodiment. That is, in the laser processing apparatus 102 ⁇ / b> A, the laser light Lr is incident along the first optical path A ⁇ b> 1 and reaches the reflective SLM 121. After the laser beam Lr is modulated by the reflective SLM 121, the laser beam Lr reaches the dielectric multilayer mirror 122. On the other hand, the illumination light Li enters from the back side of the dielectric multilayer mirror 122 and passes through the dielectric multilayer mirror 122.
- Both the laser light Lr and the illumination light Li travel on the second optical path A2, and reach the part to be processed of the object to be processed through the two reflecting mirrors 126 and the condenser lens 125. Further, the observation light Lo obtained by reflection or scattering at the part to be processed follows an optical path opposite to that of the illumination light Li described above. As described above, according to the laser processing apparatus 102A of the present embodiment, the illumination light Li and the observation light Lo can be prevented from being modulated by the reflection type SLM 121, so that the part to be processed is maintained while maintaining the resolution and the light quantity of the observation light Lo. Can be observed.
- the positional relationship between the dielectric multilayer mirror 122 and the reflective SLM 121 is the same as that shown in FIG. That is, the first optical path A1 of the laser light Lr extending in the X-axis direction passes through the front surface side of the dielectric multilayer mirror 122 and reaches the reflective SLM 121. Since the dielectric multilayer mirror 122 reflects the laser beam Lr forward (that is, onto the second optical path A2 extending in the Y-axis direction), the first optical path A1 and the second optical path A2 as viewed from the Z-axis direction. Will cross each other.
- the laser processing apparatus 102A can be reduced in size as compared with the case where it passes the back side as shown in FIG. 7B.
- the incident angle of the laser light Lr on the reflective SLM 121 can be reduced, crosstalk between pixels in the reflective SLM 121 can be reduced, and the influence of moire (interference fringes) in the reflective SLM 121 can be reduced. It becomes possible.
- the laser processing apparatus 102A preferably includes an imaging unit (that is, a solid-state imaging device included in the observation optical system 123) for imaging the observation light Lo.
- an imaging unit that is, a solid-state imaging device included in the observation optical system 123 for imaging the observation light Lo.
- the imaging unit images the observation light Lo that has passed through the dielectric multilayer mirror 122 along the second optical path A2. This eliminates the need to install an optical component for branching the observation light Lo from other light (laser light Lr and illumination light Li) on the second optical path A2, and thus aberration caused by such optical components. Can be reduced.
- FIG. 12 is a diagram showing a configuration of a laser processing apparatus 102B according to the fifth embodiment of the present invention.
- the configurations of the laser light source 120, the reflective SLM 121, the dielectric multilayer mirror 122, the condenser lens 125, and the reflective mirror 126 are the same as those of the laser processing apparatus 102A of the fourth embodiment described above. .
- another dielectric multilayer mirror 129 is provided on the back side of the dielectric multilayer mirror 122, and the illumination light Li emitted from the observation optical system 123 is the dielectric multilayer mirror 129. After being reflected by the body multilayer mirror 129, the light enters the dielectric multilayer mirror 122. Further, the observation light Lo transmitted through the dielectric multilayer mirror 122 is reflected by the dielectric multilayer mirror 129 and then enters the observation optical system 123.
- the AF unit 124 is optically coupled to the back surface side of the dielectric multilayer mirror 129 via the reflecting mirror 126.
- the configuration and function of the AF unit 124 are the same as those in the fourth embodiment.
- a lens 128 is provided between the condenser lens 125 and the reflecting mirror 126 and between the two reflecting mirrors 126.
- the lens 128 images the phase modulation surface of the reflective SLM 121 on the exit pupil plane of the condenser lens 125. Note that by changing the focal length of the lens, 1: 1 imaging, reduced imaging, and enlarged imaging are possible.
- the laser processing apparatus 102B includes the same configuration as the laser processing apparatus 102A according to the fourth embodiment described above, and the illumination light Li and the observation light Lo are transmitted through the dielectric multilayer mirror 122, and are of a reflective type. It does not enter the SLM 121. That is, according to the laser processing apparatus 102B, since the illumination light Li and the observation light Lo can be prevented from being modulated by the reflective SLM 121, the target portion can be observed while maintaining the resolution and the light amount of the observation light Lo. Further, by arranging the AF unit 124 on the back side of the dielectric multilayer mirror 129, the number of optical components (dichroic mirror 127 in FIG. 11) on the optical path of the illumination light Li and the observation light Lo is further reduced. Aberrations caused by optical components can be further reduced.
- FIG. 13 is a diagram showing a configuration of a laser processing apparatus 102C as a comparative example with respect to the fourth embodiment and the fifth embodiment described above.
- the configuration of the laser light source 120, the reflective SLM 121, the dielectric multilayer mirror 122, the AF unit 124, the condenser lens 125, and the reflective mirror 126 is the same as the laser processing apparatus 102A of the fourth embodiment described above. It is the same.
- the observation optical system 123 is not provided on the back side of the dielectric multilayer mirror 122.
- the observation optical system 123 is optically coupled to the condenser lens 125 via a dielectric multilayer mirror 138 provided between the condenser lens 125 and the reflecting mirror 126.
- the modulated laser beam Lr needs to pass through the plurality of dielectric multilayer film mirrors (127, 138), and the aberration caused by these increases.
- the fourth embodiment (FIG. 11) and the fifth embodiment (FIG. 12) described above the number of optical components that the modulated laser beam Lr must pass through is reduced. Aberration can be effectively reduced.
- the positional relationship between the dielectric multilayer mirror 122 and the reflective SLM 121 is similar to that in the fourth and fifth embodiments described above with reference to FIG. It is the same as the form shown in. That is, the first optical path A1 of the laser light Lr extending in the X-axis direction passes through the front surface side of the dielectric multilayer mirror 122 and reaches the reflective SLM 121. Since the dielectric multilayer mirror 122 reflects the laser beam Lr forward (that is, onto the second optical path A2 extending in the Y-axis direction), the first optical path A1 and the second optical path A2 as viewed from the Z-axis direction. Will cross each other.
- the laser processing apparatus 102C can be reduced in size as compared with the case where it passes through the back side as shown in FIG. 7B.
- the incident angle of the laser light Lr on the reflective SLM 121 can be reduced, crosstalk between pixels in the reflective SLM 121 can be reduced, and the influence of moire (interference fringes) in the reflective SLM 121 can be reduced. It becomes possible.
- the light modulation device and the laser processing device according to the present invention are not limited to the above-described embodiments, and various other modifications are possible.
- the light modulation device according to the present invention can be used in various applications other than laser processing applications.
- FIG. 14 is a configuration diagram of an optical modulation device 201A according to the sixth embodiment.
- the light modulation device 201A shown in this figure includes a light source 211, a light source 221, an observation unit 231, a half mirror 241, a dichroic mirror 242, a prism 243, a reflective SLM 251, a drive unit 252, and a condenser lens 261.
- the light source 211, the light source 221, and the dichroic mirror 242 constitute a light source unit in the present embodiment.
- the light source 211 is a laser light source that emits laser light Lr that is modulated light.
- the light source 221 is an illumination light source that emits illumination light Li.
- a halogen lamp is used as the light source 221.
- the dichroic mirror 242 selectively reflects light of a specific wavelength and transmits light of other wavelengths. In other words, the dichroic mirror 242 reflects the laser light Lr emitted and reached from the light source 211, and transmits the illumination light Li emitted and reached from the light source 221.
- the dichroic mirror 242 emits laser light Lr and illumination light Li having different wavelengths toward the prism 243 on the same optical path.
- the prism 243 is the first light transmissive member in the present embodiment, and is made of a light transmissive material that transmits at least the illumination light Li.
- the prism 243 has a pentahedron whose cross section is a triangle, and the first surface 243a including one side of the three sides of the triangle, the second surface 243b including the other side, and the remaining And a third surface 243c including one side. All of these surfaces 243a to 243c are parallel to the thickness direction of the prism 243 (that is, the direction perpendicular to the paper surface).
- a dielectric multilayer film mirror (first dielectric multilayer film mirror) 244a that reflects the laser light Lr and transmits the illumination light Li is formed, and on the second surface 243b.
- a dielectric multilayer mirror (second dielectric multilayer mirror) 244b that reflects the laser light Lr and transmits the illumination light Li is formed.
- the dielectric multilayer mirror 244a reflects the laser light Lr that has arrived from the dichroic mirror 242 toward the reflective SLM 251 and transmits the illumination light Li.
- the dielectric multilayer mirror 244b reflects the laser light Lr emitted from the reflective SLM 251 and reaching the condenser lens 261, and receives the illumination light Li received from the dielectric multilayer mirror 244a via the prism 243. Then, it is transmitted through the same optical path as the reflected laser beam Lr.
- the illumination light Li that has passed through the dielectric multilayer mirror 244a and entered the prism 243 from the first surface 243a is totally reflected by the third surface 243c, propagates through the prism 243, and propagates through the second surface 243b. To the dielectric multilayer mirror 244b.
- the reflective SLM 251 receives the laser light Lr reflected by the dielectric multilayer mirror 244a from an obliquely forward direction, and modulates the laser light Lr for each of the two-dimensionally arranged pixels while reflecting the laser light Lr.
- the reflection type SLM 251 of the present embodiment is a phase modulation type, and has a structure described below, for example.
- FIG. 15 is an exploded perspective view showing an LCOS (Liquid Crystal on Silicon) type structure as an example of the reflective SLM 251.
- the reflective SLM 251 includes a silicon substrate 255, a plurality of pixel electrodes 256 provided on the silicon substrate 255, a mirror layer 257 provided on the pixel electrode 256, and a mirror layer 257.
- the liquid crystal layer 258 is disposed between the alignment films (between the pixel electrode 256 and the transparent electrode 259 in the drawing).
- the pixel electrode 256 includes a plurality of electrode portions 256a arranged in a two-dimensional shape including a plurality of rows and a plurality of columns, and each pixel electrode portion 256a of the pixel electrode 256 and the transparent electrode 259 are formed of the reflective SLM 251. They are opposed to each other in the stacking direction.
- the laser light Lr sequentially passes through the glass plate 260 and the transparent electrode 259 from the outside and enters the liquid crystal layer 258, is reflected by the mirror layer 257, and is transparent from the liquid crystal layer 258.
- the electrode 259 and the glass plate 260 are sequentially transmitted and emitted to the outside.
- a voltage is applied to each of the transparent electrode 159 and the opposing pixel electrode portion 256a, and a portion of the liquid crystal layer 258 sandwiched between the pair of electrode portions 256a and 259 facing each other according to the voltage of the pixel electrode portion.
- the refractive index is changing.
- a phase shift occurs in a component in a predetermined direction orthogonal to the traveling direction of the laser light Lr, and the laser light Lr is shaped (phase modulated) for each pixel.
- the drive unit 252 sets the phase modulation amount in each of the plurality of pixels of the reflective SLM 251 that are two-dimensionally arranged, and reflects the signal for setting the phase modulation amount for each pixel. This is applied to the mold SLM251.
- the condenser lens 261 is disposed on the optical path of the laser light Lr and the illumination light Li emitted from the dielectric multilayer mirror 244b.
- the condensing lens 261 condenses the laser light Lr output from the reflective SLM 251 and reflected by the dielectric multilayer mirror 244b, and the illumination light Li transmitted through the dielectric multilayer mirror 244b to collect the laser light Lr as an object.
- An image is formed at a target portion 291 (processing portion or observation portion).
- the condenser lens 261 receives light (that is, observation light Lo) generated by reflection / scattering of the illumination light Li on the object 291, and outputs the observation light Lo toward the prism 243.
- an infinite focus objective lens is preferably used as the condenser lens 261.
- the observation light Lo includes the same wavelength component as the illumination light Li
- the observation light Lo reaches the dielectric multilayer mirror 244b from the condenser lens 261, and then propagates through the prism 243 through the dielectric multilayer mirror 244b.
- the observation light Lo is reflected by the third surface 243c of the prism 243, then passes through the dielectric multilayer mirror 244a, and further passes through the dichroic mirror 242.
- the half mirror 241 is disposed between the light source 221 and the dichroic mirror 242.
- the half mirror 241 transmits the illumination light Li emitted from the light source 221 toward the dichroic mirror 242 and reflects the observation light Lo that has passed through the dichroic mirror 242 toward the observation unit 231.
- the observation unit 231 receives the observation light Lo that has arrived from the half mirror 241 by the imaging device, and acquires an image of the target portion of the target object 291 based on the observation light Lo.
- FIG. 16 is a plan view of the SLM module 202 having the prism 243, the reflective SLM 251, and the condenser lens 261.
- 17 is a side sectional view showing a cross section taken along line IV-IV of the SLM module 202 shown in FIG. 16, and
- FIG. 18 is a cross section taken along line VV of the SLM module 202 shown in FIG. FIG.
- the SLM module 202 includes a housing 203, a prism 243 and a reflective SLM 251 housed in the housing 203, and a condensing lens 261 attached to the wall surface of the housing 203.
- the housing 203 has a substantially rectangular parallelepiped appearance, and a condensing lens 261 is attached to one of the pair of side walls, and an opening 203a is provided on the other.
- the laser beam Lr and the illumination light Li are incident from the light source unit (the light source 211, the light source 221, and the dichroic mirror 242) from the opening 203a.
- the prism 243 is placed on the bottom plate 203b of the housing 203 so that the thickness direction thereof is orthogonal to the axis connecting the opening 203a and the condenser lens 261.
- the first surface 243a of the prism 243 is disposed toward the opening 203a of the housing 203, and the second surface 243b is disposed toward the condenser lens 261.
- the third surface 243 c of the prism 243 is disposed on the bottom plate of the housing 203.
- the reflective SLM 251 is disposed above the prism 243 inside the housing 203.
- the reflective SLM 251 is supported by the tilt mechanism 204.
- the tilt mechanism 204 is fixed to the housing 203 to adjust the angle of the reflective SLM 251 and suspends the reflective SLM 251.
- a circuit board 205 for controlling the reflective SLM 251 is disposed between the tilt mechanism 204 and the top plate 203 c of the housing 203.
- the light modulation device 201A After the laser light Lr and the illumination light Li are input from the light source unit (the light source 211, the light source 221, and the dichroic mirror 242) on the same optical path, these lights are dielectric materials. The light enters the multilayer mirror 244a. In this dielectric multilayer mirror 244a, the laser light Lr and the illumination light Li are branched, and only the laser light Lr is incident on the reflective SLM 251.
- the laser light Lr modulated by the reflective SLM 251 and the illumination light Li again travel on the same optical path by the dielectric multilayer film mirror 244b, and reach the target portion of the target object 291 as the processing target or observation target.
- the observation light Lo obtained by reflection or scattering at the target site follows the optical path opposite to the illumination light Li described above, reaches the half mirror 241, and is observed by the observation unit 231.
- the illumination light Li and the observation light Lo pass through the prism 243 and do not enter the reflective SLM 251. That is, according to the light modulation device 201A, since the illumination light Li and the observation light Lo can be prevented from being modulated by the reflection type SLM 251, the target portion can be determined while maintaining the resolution and the light amount of the observation light Lo incident on the observation unit 231. Can be observed.
- a prism 243 is used as a translucent member on which the dielectric multilayer mirrors 244a and 244b are formed, and the illumination light Li and the observation light Lo are propagated through the prism 243, whereby the dielectric A configuration in which the optical paths of the laser beam Lr and the illumination light Li are branched in the multilayer mirror 244a, and these lights are again made the same optical path in the dielectric multilayer mirror 244b can be suitably realized. Further, according to such a configuration, it is not necessary to adjust the angles of the dielectric multilayer mirrors 244a and 244b and the optical path of the illumination light Li that passes through them, so that the assembly of the light modulation device 201A can be simplified.
- FIG. 19 is a configuration diagram of an optical modulation device 201B according to the seventh embodiment.
- the structural difference between the light modulation device 201B shown in this figure and the light modulation device 201A of the sixth embodiment is the mode of the translucent member on which the dielectric multilayer mirrors 244a and 244b are formed.
- the configuration and operation of other configurations (light source 211, light source 221, observation unit 231, half mirror 241, dichroic mirror 242, reflection type SLM 251, drive unit 252, and condenser lens 261) are described in the sixth embodiment. Since it is the same as that of a form, detailed description is abbreviate
- the light modulation device 201 ⁇ / b> B is replaced with the light transmitting plate 245 as the first light transmitting member in the present embodiment, instead of the prism 243 illustrated in FIG. 14, and the second in the present embodiment.
- a translucent plate 246 provided separately from the translucent plate 245 is provided as a translucent member.
- the translucent plates 245 and 246 are made of a translucent material that transmits at least the illumination light Li.
- a first dielectric multilayer mirror 244a is formed on the plate surface of the translucent plate 245, and a second dielectric multilayer mirror 244b is formed on the plate surface of the translucent plate 246.
- the dielectric multilayer mirror 244a reflects the laser light Lr that has arrived from the dichroic mirror 242 toward the reflective SLM 251 and transmits the illumination light Li.
- the illumination light Li transmitted through the dielectric multilayer mirror 244a passes through the light transmitting plate 245 and the light transmitting plate 246 and reaches the dielectric multilayer mirror 244b.
- the laser beam Lr is incident on the reflective SLM 251 and after being modulated, reaches the dielectric multilayer mirror 244b.
- the dielectric multilayer mirror 244b reflects the laser light Lr toward the condenser lens 261 and transmits the illumination light Li onto the same optical path as the reflected laser light Lr.
- the illumination light Li and the observation light Lo pass through the path of the light transmission plate 245 and the light transmission plate 246 and do not enter the reflective SLM 251. That is, also in the light modulation device 201B, since the illumination light Li and the observation light Lo can be prevented from being modulated by the reflective SLM 251, the target site is observed while maintaining the resolution and the light amount of the observation light Lo incident on the observation unit 231. can do.
- the dielectric multilayer mirrors 244a and 244b are respectively formed on separate light transmitting plates 245 and 246, and the illumination light Li transmitted through the dielectric multilayer mirror 244a is directed to the dielectric multilayer mirror 244b. Propagate towards.
- the optical paths of the laser light Lr and the illumination light Li are branched in the dielectric multilayer mirror 244a, and these lights are again made the same optical path in the dielectric multilayer mirror 244b.
- the light modulation device is not limited to the above-described embodiment, and various other modifications are possible.
- a prism is illustrated as the first light transmissive member
- a light transmissive plate is illustrated as the first and second light transmissive members.
- the translucent member and the second translucent member are not limited to these, and can be composed of members of various materials and shapes that can transmit illumination light.
- the present invention provides a light modulation device and a laser processing device capable of observing a target portion while maintaining the resolution and light quantity of observation light.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Mechanical Light Control Or Optical Switches (AREA)
- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
- Laser Beam Processing (AREA)
Abstract
Description
201A,201B…光変調装置、202…SLMモジュール、203…筐体、203a…開口、203b…底板、203c…天板、204…あおり機構、205…回路基板、211,221…光源、231…観察部、241…ハーフミラー、242…ダイクロイックミラー、243…プリズム、243a…第1の面、243b…第2の面、243c…第3の面、244a…(第1の)誘電体多層膜鏡、244b…(第2の)誘電体多層膜鏡、245,246…透光板、251…反射型SLM、252…駆動部、261…集光レンズ、291…対象物、Li…照明光、Lo…観察光、Lr…レーザ光。
図1~図4は、本発明の第1実施形態に係る光変調装置101Aの構成を示す図である。図1は光変調装置101Aの平面断面図を示しており、図2は光変調装置101Aの底面図を示している。また、図3は図1のIII-III線に沿った光変調装置101Aの側断面図であり、図4はIII-III線の矢視方向とは反対の方向から見た光変調装置101Aの側面図である。なお、理解を容易にするため、これらの図1~図4にはXYZ直交座標系が示されている。
図9は、本発明の第2実施形態に係る光変調装置101Bの構成を示す図である。なお、本実施形態において、筐体103、透光性部材105、誘電体多層膜鏡106、反射型SLM107、及び集光レンズ109の構成は、上述した第1実施形態の光変調装置101Aと同様である。
図10は、本発明の第3実施形態に係る光変調装置101Cの構成を示す図である。なお、本実施形態においても、筐体103、透光性部材105、誘電体多層膜鏡106、反射型SLM107、及び集光レンズ109の構成は、上述した第1実施形態の光変調装置101Aと同様である。また、照明光源111、観察部113およびハーフミラー115の構成は、上述した第2実施形態の光変調装置101Bと同様である。
図11は、本発明の第4実施形態に係るレーザ加工装置102Aの構成を示す図である。本実施形態のレーザ加工装置102Aは、外部から入力したレーザ光Lrを変調して出力するとともに、加工対象物の内部に集光点を合わせてレーザ光Lrを照射することにより加工対象物を加工する装置である。なお、理解を容易にするため、図11にはXYZ直交座標系が示されている。
図12は、本発明の第5実施形態に係るレーザ加工装置102Bの構成を示す図である。なお、本実施形態において、レーザ光源120、反射型SLM121、誘電体多層膜鏡122、集光レンズ125、及び反射鏡126の構成は、上述した第4実施形態のレーザ加工装置102Aと同様である。
図13は、上記した第4実施形態および第5実施形態に対する比較例として、レーザ加工装置102Cの構成を示す図である。なお、本比較例において、レーザ光源120、反射型SLM121、誘電体多層膜鏡122、AFユニット124、集光レンズ125、及び反射鏡126の構成は、上述した第4実施形態のレーザ加工装置102Aと同様である。
本発明に係る光変調装置の第6実施形態について説明する。図14は、第6実施形態に係る光変調装置201Aの構成図である。この図に示される光変調装置201Aは、光源211、光源221、観察部231、ハーフミラー241、ダイクロイックミラー242、プリズム243、反射型SLM251、駆動部252、および集光レンズ261を備える。
続いて、本発明に係る光変調装置の第7実施形態について説明する。図19は、第7実施形態に係る光変調装置201Bの構成図である。この図に示される光変調装置201Bと第6実施形態の光変調装置201Aとの構成上の相違点は、誘電体多層膜鏡244a,244bが形成される透光性部材の態様である。なお、他の構成(光源211、光源221、観察部231、ハーフミラー241、ダイクロイックミラー242、反射型SLM251、駆動部252、および集光レンズ261)の構成および作用に関しては、前述した第6実施形態と同様なので詳細な説明を省略する。
Claims (8)
- レーザ光を変調して出力するとともに、前記レーザ光とは波長が異なる照明光を変調後の前記レーザ光と同一の光路上に出力する光変調装置であって、
第1の方向に延びる第1の光路に沿って入射した前記レーザ光を斜め前方より受け、該レーザ光を反射させつつ、二次元配列された複数の画素毎に前記レーザ光を変調する反射型の空間光変調器と、
前記照明光を透過させる透光性部材上に形成され、前記空間光変調器から前面に入射した前記レーザ光を、前記第1の方向と交差する第2の方向に延びる第2の光路上へ反射させるとともに、背面に入射した前記照明光を前記第2の光路上へ透過させる誘電体多層膜鏡と、
前記誘電体多層膜鏡から前記照明光及び前記レーザ光を受け、前記照明光及び前記レーザ光を集光する集光レンズと
を備えることを特徴とする、光変調装置。 - 前記第1の光路が前記誘電体多層膜鏡の背面側を通過することを特徴とする、請求項1に記載の光変調装置。
- 前記第1の光路が前記誘電体多層膜鏡の前面側を通過し、前記第1及び第2の方向と直交する第3の方向から見て前記第1の光路と前記第2の光路とが互いに交差することを特徴とする、請求項1に記載の光変調装置。
- 加工対象物の内部に集光点を合わせてレーザ光を照射することにより前記加工対象物を加工するレーザ加工装置であって、
レーザ光を出射するレーザ光源と、
前記レーザ光とは波長が異なる照明光を出射する照明光源と、
第1の方向に延びる第1の光路に沿って入射した前記レーザ光を斜め前方より受け、該レーザ光を反射させつつ、二次元配列された複数の画素毎に前記レーザ光を変調する反射型の空間光変調器と、
前記照明光を透過させる透光性部材上に形成され、前記空間光変調器から前面に入射した前記レーザ光を、前記第1の方向と交差する第2の方向に延びる第2の光路上へ反射させるとともに、背面に入射した前記照明光を前記第2の光路上へ透過させる誘電体多層膜鏡と、
前記誘電体多層膜鏡から前記照明光及び前記レーザ光を受け、前記照明光及び前記レーザ光を前記加工対象物の内部に集光させる集光レンズと
を備えることを特徴とする、レーザ加工装置。 - 前記照明光が前記加工対象物において反射または散乱することにより生じた観察光を撮像するための撮像手段を更に備えることを特徴とする、請求項4に記載のレーザ加工装置。
- 前記第2の光路に沿って前記誘電体多層膜鏡を透過した前記観察光を前記撮像手段が撮像することを特徴とする、請求項5に記載のレーザ加工装置。
- 互いに波長が異なるレーザ光及び照明光を同一の光路上に出射する光源部と、
前記照明光を透過する第1の透光性部材上に形成され、前記光源部から前記レーザ光及び前記照明光を受け、前記レーザ光を反射させて前記照明光を透過させる第1の誘電体多層膜鏡と、
前記第1の誘電体多層膜鏡から前記レーザ光を斜め前方より受け、該レーザ光を反射させつつ、二次元配列された複数の画素毎に前記レーザ光を変調する反射型の空間光変調器と、
前記第1の透光性部材上、又は前記第1の透光性部材とは別に設けられ前記照明光を透過させる第2の透光性部材上に形成され、前記空間光変調器から受けた前記レーザ光を反射させるとともに、前記第1の誘電体多層膜鏡から受けた前記照明光を反射後の前記レーザ光と同一の光路上へ透過させる第2の誘電体多層膜鏡と、
前記第2の誘電体多層膜鏡から前記照明光及び前記レーザ光を受け、前記照明光及び前記レーザ光を集光する集光レンズと
を備えることを特徴とする、光変調装置。 - 前記第1の透光性部材はプリズムから成り、
前記第1の誘電体多層膜鏡が、前記プリズムの第1の面上に形成されており、
前記第2の誘電体多層膜鏡が、前記プリズムの第2の面上に形成されており、
前記照明光が、前記第1の面から前記プリズム内を伝搬して前記第2の面に達することを特徴とする、請求項7に記載の光変調装置。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN200980147787.1A CN102227667B (zh) | 2008-11-28 | 2009-11-26 | 光调制装置 |
US13/131,186 US9285579B2 (en) | 2008-11-28 | 2009-11-26 | Light modulating device and laser processing device |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2008304748A JP5474340B2 (ja) | 2008-11-28 | 2008-11-28 | 光変調装置 |
JP2008-304738 | 2008-11-28 | ||
JP2008-304748 | 2008-11-28 | ||
JP2008304738A JP2010128325A (ja) | 2008-11-28 | 2008-11-28 | 光変調装置およびレーザ加工装置 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2010061884A1 true WO2010061884A1 (ja) | 2010-06-03 |
Family
ID=42225755
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2009/069946 WO2010061884A1 (ja) | 2008-11-28 | 2009-11-26 | 光変調装置およびレーザ加工装置 |
Country Status (3)
Country | Link |
---|---|
US (1) | US9285579B2 (ja) |
CN (1) | CN102227667B (ja) |
WO (1) | WO2010061884A1 (ja) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012081292A1 (ja) * | 2010-12-13 | 2012-06-21 | 株式会社ニコン | 空間光変調器及びその駆動方法、並びに露光方法及び装置 |
JP5947172B2 (ja) * | 2012-09-19 | 2016-07-06 | 浜松ホトニクス株式会社 | 波長変換型空間光変調装置 |
JP6225474B2 (ja) * | 2013-05-14 | 2017-11-08 | セイコーエプソン株式会社 | 表示装置 |
JP6150313B1 (ja) * | 2016-02-15 | 2017-06-21 | 三菱重工業株式会社 | レーザ加工機 |
CN106940481B (zh) * | 2017-05-18 | 2022-12-02 | 华中科技大学 | 一种反射式激光光束整形装置 |
CN114815223A (zh) | 2017-07-06 | 2022-07-29 | 浜松光子学株式会社 | 光学器件 |
JP7034621B2 (ja) * | 2017-07-25 | 2022-03-14 | 浜松ホトニクス株式会社 | レーザ加工装置 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006035775A1 (ja) * | 2004-09-27 | 2006-04-06 | Hamamatsu Photonics K.K. | 空間光変調装置、光学処理装置、カップリングプリズム、及び、カップリングプリズムの使用方法 |
JP2007029983A (ja) * | 2005-07-26 | 2007-02-08 | Olympus Corp | レーザリペア装置 |
JP2008221237A (ja) * | 2007-03-08 | 2008-09-25 | Olympus Corp | レーザ加工装置 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2648892B2 (ja) | 1990-12-19 | 1997-09-03 | エヌティエヌ 株式会社 | レーザ加工装置 |
US6734889B2 (en) | 2002-09-10 | 2004-05-11 | Eastman Kodak Company | Color printer comprising a linear grating spatial light modulator |
JP2004327769A (ja) | 2003-04-25 | 2004-11-18 | Nikon Corp | 観察装置、位置検出装置、露光装置、および露光方法 |
JP2006035775A (ja) * | 2004-07-29 | 2006-02-09 | Takiron Co Ltd | 制電性樹脂成形体 |
JP4429974B2 (ja) | 2005-06-17 | 2010-03-10 | オリンパス株式会社 | レーザ加工方法および装置 |
US20090091730A1 (en) | 2007-10-03 | 2009-04-09 | Nikon Corporation | Spatial light modulation unit, illumination apparatus, exposure apparatus, and device manufacturing method |
JP2010004008A (ja) * | 2007-10-31 | 2010-01-07 | Nikon Corp | 光学ユニット、照明光学装置、露光装置、露光方法、およびデバイス製造方法 |
JP5039583B2 (ja) | 2008-01-24 | 2012-10-03 | 浜松ホトニクス株式会社 | 観察装置 |
-
2009
- 2009-11-26 CN CN200980147787.1A patent/CN102227667B/zh active Active
- 2009-11-26 US US13/131,186 patent/US9285579B2/en active Active
- 2009-11-26 WO PCT/JP2009/069946 patent/WO2010061884A1/ja active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006035775A1 (ja) * | 2004-09-27 | 2006-04-06 | Hamamatsu Photonics K.K. | 空間光変調装置、光学処理装置、カップリングプリズム、及び、カップリングプリズムの使用方法 |
JP2007029983A (ja) * | 2005-07-26 | 2007-02-08 | Olympus Corp | レーザリペア装置 |
JP2008221237A (ja) * | 2007-03-08 | 2008-09-25 | Olympus Corp | レーザ加工装置 |
Also Published As
Publication number | Publication date |
---|---|
CN102227667A (zh) | 2011-10-26 |
CN102227667B (zh) | 2014-08-06 |
US9285579B2 (en) | 2016-03-15 |
US20110267679A1 (en) | 2011-11-03 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2010061884A1 (ja) | 光変調装置およびレーザ加工装置 | |
JP7387797B2 (ja) | ファイバ走査プロジェクタのための方法およびシステム | |
CN108604005B (zh) | 光片显微镜和用于样品的光学显微成像的方法 | |
JP5900515B2 (ja) | 構造化照明装置、構造化照明顕微鏡装置、構造化照明方法 | |
EP2369401B1 (en) | Optical modulator device and spatio-temporally light modulated imaging system | |
JP7087000B2 (ja) | マルチ開口撮像装置、画像化システム、およびマルチ開口撮像装置を提供する方法 | |
JP2020523625A5 (ja) | ||
JP2011002698A (ja) | 位相変調装置、及び位相変調装置を使った観察システム | |
JP6116142B2 (ja) | 走査型共焦点レーザ顕微鏡 | |
TW200732822A (en) | Projector | |
JP2009069692A (ja) | レーザー走査型顕微鏡 | |
US20220157483A1 (en) | Reconfigurable counterpropagating holographic optical tweezers with low-na lens | |
WO2011152432A1 (ja) | 共焦点顕微鏡画像システム | |
JP2010066575A (ja) | 共焦点光スキャナ | |
JP2004341394A (ja) | 走査型光学顕微鏡 | |
US20170205609A1 (en) | Image-forming optical system, illumination apparatus, and microscope apparatus | |
JP2019523456A (ja) | 顕微鏡特に光シート顕微鏡または共焦点顕微鏡および顕微鏡用レトロフィットキット | |
JP2004109219A (ja) | 走査型光学顕微鏡 | |
US7388714B2 (en) | Independent focus compensation for a multi-axis imaging system | |
WO2018003611A1 (ja) | 偏波分離素子、光学系及び光学機器 | |
JP4723842B2 (ja) | 走査型光学顕微鏡 | |
JP5474340B2 (ja) | 光変調装置 | |
JP2006106337A (ja) | 走査型光学顕微鏡 | |
JP2010128325A (ja) | 光変調装置およびレーザ加工装置 | |
WO2023223371A1 (ja) | 焦点距離可変レンズ装置 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 200980147787.1 Country of ref document: CN |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 09829129 Country of ref document: EP Kind code of ref document: A1 |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 13131186 Country of ref document: US |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 09829129 Country of ref document: EP Kind code of ref document: A1 |