WO2017145231A1 - ダイクロイックミラーアレイ - Google Patents
ダイクロイックミラーアレイ Download PDFInfo
- Publication number
- WO2017145231A1 WO2017145231A1 PCT/JP2016/055032 JP2016055032W WO2017145231A1 WO 2017145231 A1 WO2017145231 A1 WO 2017145231A1 JP 2016055032 W JP2016055032 W JP 2016055032W WO 2017145231 A1 WO2017145231 A1 WO 2017145231A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- sin
- dichroic
- dichroic mirror
- array
- light
- Prior art date
Links
- 230000003287 optical effect Effects 0.000 claims abstract description 97
- 239000000463 material Substances 0.000 claims abstract 5
- 230000004907 flux Effects 0.000 claims description 40
- 239000013598 vector Substances 0.000 claims description 16
- 238000001514 detection method Methods 0.000 claims description 15
- NCGICGYLBXGBGN-UHFFFAOYSA-N 3-morpholin-4-yl-1-oxa-3-azonia-2-azanidacyclopent-3-en-5-imine;hydrochloride Chemical compound Cl.[N-]1OC(=N)C=[N+]1N1CCOCC1 NCGICGYLBXGBGN-UHFFFAOYSA-N 0.000 claims description 13
- 230000002829 reductive effect Effects 0.000 claims description 13
- 239000000758 substrate Substances 0.000 claims description 7
- 229920000535 Tan II Polymers 0.000 claims description 4
- 230000014509 gene expression Effects 0.000 description 13
- 230000035945 sensitivity Effects 0.000 description 10
- 238000010586 diagram Methods 0.000 description 9
- 230000003595 spectral effect Effects 0.000 description 8
- 230000007423 decrease Effects 0.000 description 6
- 230000003247 decreasing effect Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 239000010408 film Substances 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 239000003086 colorant Substances 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 239000011521 glass Substances 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- OVSKIKFHRZPJSS-UHFFFAOYSA-N 2,4-D Chemical compound OC(=O)COC1=CC=C(Cl)C=C1Cl OVSKIKFHRZPJSS-UHFFFAOYSA-N 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000023077 detection of light stimulus Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012788 optical film Substances 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
- 238000009304 pastoral farming Methods 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000005549 size reduction Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 239000012780 transparent material Substances 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/10—Beam splitting or combining systems
- G02B27/14—Beam splitting or combining systems operating by reflection only
- G02B27/141—Beam splitting or combining systems operating by reflection only using dichroic mirrors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/02—Details
- G01J3/0205—Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows
- G01J3/0208—Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows using focussing or collimating elements, e.g. lenses or mirrors; performing aberration correction
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/02—Details
- G01J3/0205—Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows
- G01J3/021—Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows using plane or convex mirrors, parallel phase plates, or particular reflectors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/28—Investigating the spectrum
- G01J3/30—Measuring the intensity of spectral lines directly on the spectrum itself
- G01J3/36—Investigating two or more bands of a spectrum by separate detectors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/46—Measurement of colour; Colour measuring devices, e.g. colorimeters
- G01J3/50—Measurement of colour; Colour measuring devices, e.g. colorimeters using electric radiation detectors
- G01J3/51—Measurement of colour; Colour measuring devices, e.g. colorimeters using electric radiation detectors using colour filters
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
- G02B19/0033—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use
- G02B19/0076—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a detector
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/10—Beam splitting or combining systems
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/10—Beam splitting or combining systems
- G02B27/14—Beam splitting or combining systems operating by reflection only
- G02B27/145—Beam splitting or combining systems operating by reflection only having sequential partially reflecting surfaces
- G02B27/146—Beam splitting or combining systems operating by reflection only having sequential partially reflecting surfaces with a tree or branched structure
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
- G02B5/26—Reflecting filters
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
- G02B5/28—Interference filters
Definitions
- the present invention relates to a device that divides a single or a plurality of light beams into light beams having different wavelengths, or a device that superimposes a plurality of light beams having different wavelengths on a single light beam.
- a dichroic mirror array allows a plurality of dichroic mirrors (hereinafter abbreviated as dichroic) having different spectral characteristics (wavelength dependence of transmitted light and reflected light with respect to incident light) to be in the same direction.
- the devices are arranged in parallel with each other at equal intervals.
- the light beam incident on the dichroic array is divided into a plurality of light beams having different wavelength bands by repeating reflection and transmission in the order of arrangement in each dichroic, and spectral detection is performed by detecting these.
- a plurality of light beams having different wavelength bands incident on each dichro are integrated into a single light beam in which the different wavelength bands are overlapped by repeating reflection and transmission at each dichro.
- Patent Document 1 discloses a spectroscopic device using a dichroic array.
- a plurality of dichroics having different spectral characteristics are arranged in the same direction, in parallel with each other at equal intervals, and incident light incident along the arrangement direction is perpendicular to the arrangement direction by repeating reflection and transmission at each dichro.
- the light is divided into a plurality of outgoing lights having different wavelength bands that are emitted in the direction. These emitted lights are perpendicularly incident on and detected by each sensor of a sensor array in which a plurality of sensors are arranged along the above-described direction.
- Each dichro constituting the dichroic array is a dielectric multilayer film formed inside a transparent material such as glass.
- each dichro which comprises a dichroic array is plate shape, and is arrange
- Patent Document 2 discloses a spectroscopic device using a dichroic array of a different type from Patent Document 1.
- a plurality of dichroics having different spectral characteristics are arranged in the air in the same direction, in parallel with each other, at equal intervals.
- total reflection mirror arrays are arranged at equal intervals in parallel with each other in the above direction.
- Each total reflection mirror is arranged so that the reflected light of each dichroic is incident and the reflected light is incident on the adjacent dichroic.
- the incident light incident along the above direction is bent vertically and then reflected and transmitted by each dichroic and each total reflection mirror, so that it is perpendicular to the above direction and opposite to the total reflection mirror array.
- the light is divided into a plurality of outgoing lights having different wavelength bands.
- Patent Document 3 discloses a multiplexing device using a dichroic array.
- a plurality of dichroics having different spectral characteristics are arranged in the same direction, parallel to each other, and at equal intervals, and a plurality of laser beams having different wavelengths incident on each dichro are reflected and transmitted repeatedly by each dichro. , And are integrated into a single laser beam having a plurality of different wavelengths that are emitted in the above directions.
- each dichroic is arranged with a step in the direction perpendicular to the above direction, but there is no disclosure about the description and the amount thereof.
- incident light is parallel light or substantially parallel light.
- incident light cannot often be regarded as parallel light.
- incident light is treated as a light beam, and it is necessary to consider how the diameter of the light beam (the width of the cross section perpendicular to the optical axis of the light beam) changes.
- the dichroic array has an aperture width that indicates the upper limit of the diameter of the light beam that can be accepted depending on its structure. For example, if the diameter of the light beam increases with the optical path length, the diameter may exceed the aperture width, and a part of the light beam may be vignetted due to the structure of the dichroic array, that is, a part of the light beam may be lost and not detected.
- the dichroic array has a structure with the smallest possible optical path length and the largest possible opening width.
- the optical path length of the dichroic array is defined by the optical path length of the divided light having the longest optical path length among the plurality of divided lights generated by the dichroic array.
- the optical path length of the dichroic array is defined by the optical path length of the incident light having the longest optical path length among the plurality of incident lights integrated by the dichroic array.
- it is necessary to downsize the dichroic array that is, to reduce the size and interval of each dichroic.
- downsizing the dichroic array can reduce the size of the apparatus and thereby reduce the manufacturing cost. For example, since the size of each dichro can be reduced, the unit price of each dichro can be reduced.
- the ratio of the thickness of each dichro to the width in the entrance surface of each dichro is not negligible.
- the amount of refraction of the light beam inside each dichro that is, before and after the transmission of the light beam through each dichro.
- the ratio of the optical axis deviation (deviation between the dichroic array arrangement direction and the vertical direction) to the width of each dichroic arrangement direction and the vertical direction (width within the incident light surface of each dichroic) was not negligible. .
- the ratio of the thickness of each dichro to the interval in the arrangement direction of each dichro is not negligible, specifically, n-1 of the above light flux with respect to the width of the light flux reflected by the nth dichroic.
- the ratio of the width of the vignetting part in the second dichro was not negligible. Both correspond to the fact that the thickness of each dichro cannot be regarded as zero.
- the structure of the dichroic array is optimized in order to avoid or reduce the influence of the increase in the ratio of the thickness of each dichroic to the width and interval of each dichroic.
- a step is provided in the direction perpendicular to the arrangement direction of the dichroic array, and the amount of the step is optimized according to the width and thickness of each dichroic.
- the interval between each dichro is optimized according to the width and thickness of each dichro.
- the step and the interval in the dichroic array satisfy the predetermined relationship with the width and thickness of each dichroic, thereby avoiding or reducing the above-mentioned effects, reducing the size of the dichroic array, and reducing the optical path length and the aperture width. Increase both.
- the apparatus size can be reduced and the cost can be reduced, and various types of light beams can be detected and integrated.
- Dichroic optical path length of the array is L max or less, the opening diameter is equal to or greater than W min, shows the relationship between the spacing x of the thickness ⁇ and dichroic array of dichroic.
- the figure which shows the example of the relationship between the optical path length of a light beam and the maximum diameter, and the dichroic array which can respond The figure which shows the example of the relationship between the optical path length of a light beam and the maximum diameter, and the dichroic array which can respond.
- the schematic diagram of the light emission detection apparatus which condenses the light emission from a light emission point array with a condensing lens array separately, divides
- Fig. 1 shows the generalized optimal arrangement that achieves both shortening the optical path length of the dichroic array and expanding the aperture width when the ratio of the thickness of each dichroic to the width and spacing of each dichroic is relatively large. It is a schematic diagram.
- incident light is introduced into the dichroic array from a direction parallel to the arrangement direction of each dichroic, but here the incident light is introduced from the vertical direction in order to make the device more compact. An example will be described.
- FIG. 1 is a cross-sectional view of a dichroic array by a plane stretched by an array axis and an output axis.
- Each normal vector (not shown in FIG. 1) of each dichroic is composed of the sum of the positive component in the array axis direction and the negative component in the output axis direction (that is, each normal vector is in the upper left in FIG. 1).
- each dichro has an optical film formed on at least one front surface of a transparent substrate having a refractive index n 0 .
- the dichroic M (1) and M (N) may be total reflection mirrors. In this embodiment, it is expressed as dichroic including the total reflection mirror. As shown in FIG. 1, the width of each dichro is ⁇ and the thickness is ⁇ . Further, the depth of each dichro in the direction perpendicular to the paper surface of FIG.
- the width ⁇ is defined as a width of each dichroic that is parallel to a plane stretched between the array axis and the emission axis and perpendicular to the normal vector.
- the thickness ⁇ is defined as the width of each dichroic parallel to the normal vector.
- Depth ⁇ is defined as the width of each dichroic perpendicular to the plane stretched by the array axis and the output axis and perpendicular to the normal vector.
- the lower end of dichroic M (2) (the end in the exit axis direction of M (2)) is the lower end of dichroic M (1) (the end in the positive direction of the exit axis of M (1)).
- the lower end of the dichroic M (3) is shifted from the lower end of the M (2) (the end in the positive direction of the outgoing axis of the M (2)) by z (upward in the negative direction of the outgoing axis).
- the lower end of the dichroic M (n) is shifted from the lower end of the dichroic M (n ⁇ 1) by z.
- each dichroic is arranged along the arrangement axis, strictly speaking, the arrangement direction is slightly inclined from the arrangement axis. However, y and z are often smaller than x, and the inclination is sufficiently small. Therefore, in this embodiment, each dichro is expressed as an array along the array axis as described above.
- an ideally parallel light beam 70 is incident on the dichroic M (1) along the emission axis, and is reflected along the array axis and is transmitted along the emission axis.
- the reflected light beam shown on the left is incident on the dichroic M (2) along the array axis, and is divided into a light beam F (2) reflected along the output axis and a light beam transmitted along the array axis.
- the transmitted light beam on the left is incident on the dichroic M (3) along the array axis, and is divided into a light beam F (3) reflected along the output axis and a light beam transmitted along the array axis.
- the light beam transmitted through the dichroic M (n ⁇ 1) is incident on the dichroic M (n) along the arrangement axis, and the light beam F (n) reflected along the emission axis; It is divided into luminous fluxes that are transmitted along the arrangement axis.
- the dichroic M (n) is the total reflection mirror M (n)
- the right end (end in the negative direction of the array axis) is indicated by a broken line as the right edge 66
- the left end is indicated by a dashed line as the left end 67 of the luminous flux.
- the light flux F (N) are traced to the right and left ends.
- the widths of the light flux 70 and F (1), F (2),..., F (N) are set to be equal and maximum. The above width is called the opening width of the dichroic array, and is W.
- the optical path length of the dichroic array is defined by the optical path length of the longest optical path within the region surrounded by the upper end, right end, lower end, and left end of the dichroic array.
- the upper end of the dichroic array that is, the upper end of the dichroic M (N) (the end in the negative direction of the outgoing axis) on the optical axis of the luminous flux 70, and the point of the luminous flux F (N)
- FIG. 1 shows the best mode arrangement for maximizing W and minimizing L for given ⁇ , ⁇ , n 0 , and ⁇ 0 .
- the light beam right end 66 passes through a corner 69 at the left end (end in the arrangement axis direction) of dichroic M (1), M (2),. Or it's to graze.
- the left end 67 of the light beam passes or grazes the corner 68 of the lower end (end in the exit axis direction) of the dichroic M (1) indicated by ⁇ , and the dichroic M (2),. 1) passing or grazing the corner 69 at the left end (end in the arrangement axis direction).
- the following relational expression is derived from the geometrical relationship of FIG. 1 based on these conditions.
- the incident angle of the light beam 70 at the incident surface of the dichroic M (1) is ⁇ 0
- the incident angle of the light beam on the incident surfaces of the dichroic M (2) to M (N) is 90 ° ⁇ 0
- optical path length L is the best mode
- x 0 , W 0 , L 0 , y 0 , and z 0 are all associated with ⁇ and ⁇ .
- the above ⁇ , ⁇ , n 0 , ⁇ 0 , x, and z are basically equal for each dichroic, but are not necessarily equal. In such a case, ⁇ , ⁇ , n 0 , ⁇ 0 , x, and z are average values for a plurality of dichroics.
- ⁇ , ⁇ , and x for obtaining the maximum value L max of the target optical path length can be derived.
- the equal mode is the best mode.
- W min 0.5 mm, 1 mm, 2 mm, 3 mm, and 4 mm
- L max 5 mm, 10 mm, 20 mm, 30 mm, and 40 mm
- ⁇ is the range above the straight line
- ⁇ is the range below the straight line Is shown.
- FIG. 3 is an example of a dichroic array that divides a light beam incident parallel to the dichroic array in the vertical direction, and is a diagram showing a result of calculating a parallel light beam having the maximum splittable width.
- FIG. 3 is a schematic cross-sectional view of a dichroic array with a plane stretched by the array axis and the output axis. A light beam along the direction of the array axis is incident on the dichroic array, and a plurality of output axis directions of different wavelength bands depending on the dichroic array. The light beams are split along the light fluxes that are incident on the two-dimensional sensor 30 in parallel.
- the upper end (end in the negative direction of the output axis) and the lower end (end in the positive direction of the output axis) of each dichro were each on the same plane, that is, have the same output axis coordinates.
- FIG. 3 shows the result of calculating each light flux so that the width 63 of each light flux is equal and maximized in the above dichroic array.
- the output axis coordinate of the optical axis of the light beam incident on the dichroic array was adjusted so that the width 63 was maximized.
- Each light beam is composed of eleven, parallel and equally spaced, infinitesimal light beam elements 65, and each light path was calculated by ray tracing according to the law of reflection and the law of refraction. That is, the width 63 of each light beam indicates the opening width W of the dichroic array.
- FIG. 4 is a diagram in which the traveling direction of the light beam incident on the dichroic array in FIG. 3 is changed from the arrangement axis direction to the emission axis direction.
- Other conditions such as the dichroic array are the same as in FIG.
- the reason for this is that the distance between the light source (not shown) that provides the luminous flux and the dichroic array can be made closer than in the case of FIG. 3, which is suitable for downsizing the apparatus.
- L was hardly changed, but W slightly decreased.
- FIG. 5 is a diagram showing an example in which the dichroic array is further downsized and the optical path length is shortened as compared with FIG.
- L was halved as expected, but W was significantly reduced by almost two orders of magnitude. .
- FIG. 5 shows that when the optical path length is decreased, the aperture width is further decreased, and it is impossible to achieve both reduction of the optical path length and expansion of the aperture width.
- the optical axis of the light beam moves in the negative direction of the emission axis due to the refraction of the light beam inside each dichroic, and the movement distance of each dichroic is This is due to the fact that it is significant compared to the width in the exit axis direction. For example, in FIG.
- the optical path of the light beam element is shifted in the negative direction of the outgoing axis from the right end corner of the dichroic 20, and thus reflected by the dichroic 20. Cannot produce a luminous flux.
- the optical path of the light beam element deviates in the positive direction of the array axis from the lower end corner of the dichroic 17, so that the light beam transmitted through the dichroic 17 Can't bring.
- the above moving distance is smaller than the width of each dichroic in the exit axis direction in FIG. The decrease in is not a problem. That is, the decrease in W becomes a problem as the ratio of ⁇ to ⁇ or x increases.
- FIG. 6 shows the configuration of the best mode dichroic array.
- a W 0.7 from Equation (5)
- b W ⁇ 0.4 from Equation (6)
- a L 2.8 from equation (8)
- b L 4.2 from equation (9)
- L 0 11 mm from equation (7)
- the above L Consistent with 11 mm.
- the solid line shown in FIG. 7 is the result of calculating the relationship between the distance x and the aperture width W obtained by the dichroic 17 and 18 in FIG. 6 by ray tracing.
- the total opening width may become smaller than the above result, but here, the case of two is evaluated as an index.
- W decreases in proportion to
- W 0 mm.
- W was constant at 1.3 mm.
- the broken line shown in FIG. 7 shows the relationship between the interval x and the change amount ⁇ L of the optical path length L in FIG.
- ⁇ L 0 mm
- the scales of the vertical axis of W (left side) and the vertical axis of ⁇ L (right side) were aligned, and the vertical axis of ⁇ L was inverted upside down.
- ⁇ L may become larger than the above result.
- two cases are evaluated as an index. ⁇ L naturally increased in proportion to x.
- the arrangement interval x of dichroic M (n) and M (n ⁇ 1) is [Formula 16] cos ⁇ 0 * ⁇ ⁇ x ⁇ cos ⁇ 0 * ⁇ + 2 * sin ⁇ 0 * ⁇
- the aperture width W can be increased and the optical path length L can be reduced.
- FIG. 8A shows the result of calculating the relationship between the step difference y and the opening width W obtained by the dichroic 17 and 18 in FIG.
- the total opening width may become smaller than the above result, but here, the case of two is evaluated as an index.
- W decreased in proportion to
- the negative y indicates the step in the opposite direction to that in FIG. Therefore, it was found that the step effect can be obtained by setting 0 mm ⁇ y ⁇ 1.4 mm.
- FIG. 8B shows the result of calculating the relationship between the step z and the opening width W obtained by the dichros 18 and 19 in FIG.
- W decreased in proportion to
- the traveling direction of the light beam incident on the dichroic array is perpendicular to the dichroic array direction (arrangement axis direction) as shown in FIGS.
- the traveling direction of the light beam incident on the dichroic array is parallel to the arrangement direction (arrangement axis direction) of the dichroic array, 2 ⁇ n ⁇ N and dichroic M (n)
- the aperture width W of the dichroic M (n-1) is shifted by z in the direction opposite to the exit axis, as shown in equation (18).
- the optical path length L can be reduced by enlarging.
- the opening width W and the optical path length L are reduced by adjusting the intervals x and the steps y and z of the plurality of dichroics.
- each dichroic travels in the positive direction of the arrangement axis and the negative direction of the emission axis (upper left direction), so both cancel each other, and the movement of the emission axis direction (up and down direction) every time the light beam passes through the dichroic It was suppressed, which led to an increase in the opening width 63.
- the refraction angle ⁇ 1 of the light beam on the entrance surface of the dichroic M (1) is as shown in the equation (1)
- the incident angle of the light beam on the entrance surface of the dichroic M (2) to M (N) is 90 ⁇ 0 .
- the refraction angle ⁇ 2 of the light flux at each incident surface is as shown in Equation (2).
- ⁇ represents the thickness of each dichroic
- x represents the interval between each dichroic.
- S ⁇ S ⁇ . Therefore, ⁇ 0 in this best mode is defined as ⁇ 0 (BM).
- Example 3 The light beam targeted by the dichroic array is rarely a perfect parallel light beam, and in many cases is a non-parallel light beam. That is, with the progress of the light beam (optical path length), the diameter of the light beam is not constant, but shrinks and expands. For this reason, in the above embodiment, a dichroic array configuration has been proposed that can both reduce the optical path length and increase the aperture width so that it can handle various light beams.
- the target light flux is specifically defined, and the applicability of the dichroic array is examined.
- FIG. 11 defines a specific example of the luminous flux.
- the light emitted from the light emitting point 1 having the diameter d is condensed by the condenser lens 2 having the focal length f and the effective diameter D, and the optical distance from the condenser lens 2 is g.
- a light emission point image 7 was obtained.
- the s-axis is defined along the optical axis of the condenser lens
- the t-axis is defined in a direction perpendicular thereto.
- the position of the sensor for detecting the light beam is an arbitrary position on the s-axis and is not particularly limited.
- the light emitted from the left end of the light emitting point 1 is collected according to the light beam of the solid line by the condensing lens 2, proceeds while reducing the diameter, is formed at the right end of the light emitting point image 7, and then proceeds while increasing the diameter.
- the light emitted from the right end of the light emitting point 1 is collected by the condenser lens 2 according to the broken light beam, proceeds while reducing the diameter, forms an image at the left end of the light emitting point image 7, and thereafter proceeds while increasing the diameter. To do.
- the light flux from the light emitting point 1 condensed by the condenser lens 2 is a broken line 88 and a solid line 90 in the middle between the condenser lens 2 and the light emitting point image 7, and a broken line 89 and a solid line 91 after the light emitting point image 7.
- a section where the maximum value of the above-mentioned light beam diameter is minimum is selected in a section having an arbitrary section length ⁇ s in the s-axis direction, and the maximum value at that time is ⁇ m ( ⁇ s). (Hereinafter referred to as the maximum diameter).
- equations (25) and (26), and the luminous flux expressed by ⁇ m ( ⁇ s) derived therefrom are merely examples, and ⁇ s and ⁇ m ( ⁇ s) can be obtained even if the luminous flux is other than this.
- ⁇ s and ⁇ m ( ⁇ s) can be obtained even if the luminous flux is other than this.
- a similar argument holds, and a dichroic array corresponding to such a light beam can be selected.
- a pinhole or slit is disposed at the subsequent stage of the condenser lens 2 (on the side opposite to the light emitting point 1), and a part of the light beam collected by the condenser lens 2 is behind the pinhole or slit ( It is conceivable that the light is incident on a sensor arranged on the opposite side of the condenser lens 2 and is detected. In such a case, it is necessary to perform condition setting and dichroic array selection using the relationship between ⁇ s and ⁇ m ( ⁇ s) of the light beam incident on the sensor.
- the conditions of the dichroic array that can cope with the light flux defined as above, that is, the dichroic array causes a plurality of different wavelength bands without causing vignetting or partial loss of the incident light flux.
- the light is divided into a plurality of luminous fluxes and obtained.
- N, ⁇ 0 , n 0 , ⁇ , and ⁇ are given as conditions for the dichroic array
- the maximum value W 0 of the aperture width W is given by Equation (4)
- the minimum value of the optical path length L is given by Equation (7). Best mode to determine the L 0 is presented. Therefore, the above conditions are ⁇ m ( ⁇ s) ⁇ W 0 and L 0 ⁇ ⁇ s.
- the dichroic array can divide the target luminous flux of ⁇ m ( ⁇ s) satisfactorily without losing a part thereof.
- broken lines 88 and 89 and solid lines 90 and 91 indicate the relationship between s and t in broken lines 88 and 89 and solid lines 90 and 91 in FIG. ), (26) shows ⁇ (s) with respect to s.
- FIG. 12B shows the result of obtaining ⁇ m ( ⁇ s) with respect to ⁇ s with respect to the above result.
- the other conditions were the same as in FIG.
- ⁇ (s) increased rapidly with respect to s.
- ⁇ (50 mm) 9.2 mm.
- ⁇ m ( ⁇ s) in FIG. 13B is larger than that in FIG.
- the other conditions were the same as in FIG.
- Both ⁇ (s) in FIG. 14 (a) and ⁇ m ( ⁇ s) in FIG. 14 (b) were larger than those in FIGS. 13 (a) and 13 (b).
- the purpose is to increase the luminous flux from four colors of four-divided luminous flux to four colors of eight-divided luminous flux by increasing the number of dichroic elements included in the dichroic array from four to eight.
- Other conditions are the same as those in FIG.
- an increase in N results in an increase in L, and the range of x that satisfies the equation (32) is narrowed.
- the region where the region above the broken line ⁇ 93 in FIG. 15A and the region below the broken line ⁇ 94 overlap is shown in FIG. It was narrower than that.
- the broken line ⁇ 94 changes according to N via the equations (8) and (9), while the broken line ⁇ 93 does not change according to N.
- the other conditions were the same as those in FIG.
- ⁇ (50 mm) 1.6 mm at the position of the light emission point image 7. It became.
- Example 4 In the above embodiment, the case where a single light beam is divided into a plurality of light beams having different wavelength bands by a single dichroic array has been mainly described, but the present invention is not limited to this. In this embodiment, an example is shown in which a plurality of light beams are divided in parallel into a plurality of light beams having different wavelength bands by a single dichroic array.
- FIG. 17 shows an apparatus for detecting multiple colors of light emitted from a plurality of light emitting points 1 using a condensing lens array and a dichroic array.
- 17A is a schematic diagram of a multicolor detection device viewed from a direction perpendicular to a plane including each optical axis of a plurality of condenser lenses 2, and FIG. 17B includes the optical axes of one condenser lens 2.
- FIG. 17C is an explanatory diagram showing an image 29 detected by the two-dimensional sensor 30.
- FIG. 17C is a schematic cross-sectional view of the multicolor detection device perpendicular to the arrangement direction of the condenser lens array. Here, an example of performing four-color detection is shown.
- Each light was condensed in parallel by the optical lens 2 to obtain a light beam 9.
- each light beam 9 was transmitted through a single long pass filter 10 in parallel, and was incident on a single dichroic array in parallel.
- the long pass filter 10 is for blocking the irradiation light for causing the light emission point 1 to emit light, and can be omitted when unnecessary.
- the dichroic array is equivalent to, for example, the dichroic array shown in FIG.
- each dichro constituting the dichroic array functions in parallel with respect to a plurality of light beams.
- any other dichroic array proposed in the present invention may be replaced.
- each light beam 9 incident on the dichroic array is divided in parallel into a light beam 21 transmitted through the dichroic 17 and a reflected light beam, and each light beam reflected on the left is divided in parallel into a light beam transmitted through the dichroic 18 and a light beam 22 reflected.
- the left transmitted light beam is divided in parallel into the light beam transmitted through the dichro 19 and the reflected light beam 23, and the left transmitted light beam is divided into the light beam transmitted through the dichro 20 (not shown) and the reflected light beam 24 in parallel. .
- the light beams 21, 22, 23, and 24 derived from the respective light emitting points 1 are made to travel in the same direction as the optical axis of the condenser lens 2, respectively, and are incident on the two-dimensional sensor 30 in parallel.
- the light emission point images 25, 26, 27, and 28 derived from 1 were formed.
- each light emission point image does not necessarily have a light emission point formed thereon, and may not be in focus.
- the four light beams 9 were incident in parallel on different positions of the single long-pass filter 10 and different positions of the single dichroic 17, respectively. The same applies to the parallel processing of light beams in the dichroic 18, 19, 20, and two-dimensional sensors. As shown in FIG.
- the light beam 21 is mainly A fluorescence
- the light beam 22 is mainly B fluorescence
- the light beam 23 is mainly C fluorescence
- the light beam 24 is mainly light.
- A, B, C, and D fluorescence can be detected by having a component of D fluorescence and detecting the intensity of the light emission point images 25, 26, 27, and 28.
- the wavelength bands of the light beams 25, 26, 27, and 28 may be designed arbitrarily, the dichroic design is easier if these are arranged in order of wavelength.
- the center wavelength of the fluorescence is good.
- band pass filters or colored glass filters having different spectral characteristics are arranged at the positions of the light beams 21, 22, 23, and 24 to supplement the spectral characteristics of the dichros 17-20. It is effective to increase or decrease. Further, although not shown in FIG. 17, it is effective to provide irradiation light such as excitation light for causing light emission at the light emitting point 1. If such irradiation light is irradiated from the direction perpendicular to the optical axis of the condensing lens 2 without using the condensing lens 2, the ratio of the incident light incident on the sensor via the condensing lens 2 can be reduced. Sensitivity is advantageous.
- the long pass filter 10 instead of the long pass filter 10, another dichro is disposed, and after the reflected light is reflected by the dichro, it is squeezed by the condensing lens 2 to irradiate the light emitting point 1. It is also effective to adopt a so-called epi-illumination detection configuration in which the light is condensed by the lens 2 and then transmitted through the dichroic and detected by the multicolor detection device similar to FIG.
- FIG. 18 shows an optical axis of an optical system in which light emitted from two adjacent light emitting points 1 is condensed by individual condenser lenses 2 to obtain a light emitting point image 7 which is an image of the light emitting point 1 at the sensor position.
- the expression “light emission point image” does not necessarily mean an image in which the light emission from the light emission point is imaged, but a cross-section at a predetermined position of the light beam collected from the light emission point. Generally means.
- the diameter of the light emitting point 1 is d
- the focal length of the condensing lens 2 is f
- the effective diameter of the condensing lens 2 is D
- the distance between the light emitting points 1 and the distance between the condensing lenses 2 is p
- the diameter of the detection region of the sensor is D
- the optical distance between the condenser lens 2 and the sensor is g
- the diameter of the light emission point image 7 at the sensor position is d ′.
- the image magnification m is as in Expression (23), and the diameter d ′ of the light emission point image 7 is as in Expression (24).
- the light emission point image 7 may not necessarily be formed at the sensor position, and in this case, the above is not the case.
- the light emission point 1 and the light emission point image 7 are drawn in a circular shape, but in reality, they are not necessarily circular and may have other shapes.
- the diameter d of the light emitting point 1 and the diameter d ′ of the light emitting point image 7 are the widths in the arrangement direction of the light emitting point 1 and the light emitting point image 7, respectively.
- F f / D
- the condensing efficiency is proportional to 1 / F 2 .
- f ⁇ 2.8 * D may be satisfied.
- [Formula 33] p ⁇ D It is necessary to. Therefore, [Formula 34] f ⁇ 2.8 * p Is the condition of F ⁇ 2.8.
- the above equations (34) to (38) are correct when the distance between the light emitting point 1 and the condenser lens 2 can be approximated by f, but can be expressed more strictly as follows.
- the distance between the light emitting point 1 and the condenser lens 2 is f 2 / (g ⁇ f) + f when the light emitted from the light emitting point 1 is imaged by the condenser lens 2 at the optical distance g.
- expression (46) is [Formula 48] f ⁇ 1 / ((2 * p) / (1.27 * d) +1) * g Is a condition. More preferably, the crosstalk should be 0%.
- a desired light collection efficiency and sensitivity it is possible to obtain a desired light collection efficiency and sensitivity by selecting g and f satisfying any of the equations (34) to (43) for a given p and d.
- a desired crosstalk can be obtained by selecting g and f satisfying any one of the equations (47) to (49). That is, by selecting g and f satisfying both of the equations (34) to (43) and any of the equations (47) to (49), the sensitivity and the crosstalk in a trade-off relationship are desired. Can be achieved at the same level.
- the condensing lens 2 is basically a circular shape having an effective diameter D, but it is not always necessary.
- the effective diameter D of the condensing lens 2 indicates the arrangement direction of the light emitting points 1 and the width in the arrangement direction of the condensing lens 1, and the width in the direction orthogonal to these arrangement directions is not limited thereto.
- the condenser lens 2 may be circular, elliptical, square, rectangular, or other shapes. Since the diameter d ′ of the light emission point image 7 is independent of D, the conditions of the above equations (44) to (49) relating to crosstalk remain unchanged regardless of the width in the direction orthogonal to the arrangement direction of the condenser lenses 2. To establish.
- the conditions of the above equations (34) to (43) relating to sensitivity can provide a higher relative detected light amount and sensitivity.
- the number shown on the curve or straight line indicates the boundary line of the expression of the corresponding number, ⁇ indicates the area below the boundary line, and ⁇ indicates the area above the boundary line.
- the expression (34) which is a condition of F ⁇ 2.8, it is only necessary to satisfy g and f in the region below the straight line ⁇ (34) in FIG.
- the light emission detection device using g and f shown in FIG. 20 can greatly reduce the size of the device as well as high sensitivity and low crosstalk performance. There is a feature that can be.
- the optical distance g between the sensor 2 and the sensor 30 satisfies the above relational expression, predetermined high sensitivity and low crosstalk are realized, and the detection apparatus is reduced in size and cost.
- the following features (1) to (10) are summarized in terms of downsizing and cost reduction of the multicolor detection device for the light emitting spot array using the dichroic array shown in FIG. It is not necessary to satisfy all of these characteristics, and it is effective to satisfy any one of them.
- the M light fluxes collected from the light emitting points by the condenser lens array are divided into N light fluxes having different wavelength components, respectively. In the same direction.
- the M light fluxes collected from the light emitting points by the condenser lens array are divided into N light fluxes having different wavelength components, respectively. In the direction of the optical axis of each condenser lens.
- the direction in which the M light beams collected from the light emitting points by the condensing lens array are divided into different wavelength components are designated as the light emitting point array and the light collecting points.
- the direction is perpendicular to the arrangement direction of the optical lens array.
- the direction is perpendicular to the optical axis.
- N light beams that divide the M light fluxes collected from the light emitting points by the condensing lens array into different wavelength components are The array and the condenser lens array are arranged in the direction perpendicular to the arrangement direction.
- N dichroics that divide the M light beams collected from the light emitting points by the condenser lens array into different wavelength components are Arranged in the direction perpendicular to the optical axis of the optical lens.
- each condensing lens of the condensing lens array that condenses the light emitted from each light emitting point is perpendicular to the sensor surface.
- each dichroic is composed of a single member, and each of M light beams obtained by individually collecting light emitted from M light emitting points of the light emitting point array. Incident in parallel to Dichro.
- M ⁇ N light beams obtained by dividing M light beams individually collected from M light emission points of the light emission point array into N different wavelength components are arranged in parallel on a single sensor. Incident.
- each light beam having the above characteristics needs to be satisfactorily divided without loss by the dichroic array.
- MAX (D, d ′) is a function indicating the larger of D or d ′. From the above, the following conditions are required.
- this invention is not limited to the above-mentioned Example, Various modifications are included.
- the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described.
- a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment.
Landscapes
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Health & Medical Sciences (AREA)
- Projection Apparatus (AREA)
- Spectrometry And Color Measurement (AREA)
- Optical Filters (AREA)
- Eye Examination Apparatus (AREA)
Abstract
Description
[式1]
θ1=sin-1(1/n0*sinθ0)
である。また,ダイクロM(2)~M(N)の入射面における光束の入射角は90°-θ0であり,それぞれの入射面における光束の屈折角θ2は,
[式2]
θ2=sin-1(1/n0*sin(90°-θ0))
である。
[式3]
x=x0=cosθ0*α+sinθ0*β
となる。また,光束の開口幅Wは,ベストモードにおいて,
[式4]
W=W0=aW*α+bW*β
となる。ここで,
[式5]
aW≡cosθ0
[式6]
bW≡-cosθ0*tanθ1
とした。
[式7]
L=L0=aL*α+bL*β
である。ここで,
[式8]
aL≡(N-1)*cosθ0+sinθ0
[式9]
bL≡(N-2)/cosθ0*(2*sin(90°-θ0-θ2)+1-sin(θ0+θ2))+(N-2)*sinθ0+2*cosθ0
とした。
[式10]
y=y0=cosθ0*β
[式11]
z=z0=sin(90°-θ0-θ2)/cosθ2*β
[式12]
α≧-bW/aW*β+1/aW*Wmin
となり(等号のときベストモード),式(3)より,
[式13]
x≧(sinθ0-bW/aW*cosθ0)*β+1/aW*cosθ0*Wmin
となる。等号のときがベストモードである。
[式14]
α≦-bL/aL*β+1/aL*Lmax
となり(等号のときベストモード),式(3)より,
[式15]
x≦(sinθ0-bL/aL*cosθ0)*β+1/aL*cosθ0*Lmax
となる。等号のときがベストモードである。
[実施例1]
図3は,ダイクロアレイに平行に入射する光束を垂直方向に分割するダイクロアレイの例で,分割可能な最大幅の平行光束を計算した結果を示す図である。図3は,配列軸及び出射軸で張られる平面によるダイクロアレイの断面模式図であり,配列軸方向に沿った光束がダイクロアレイに入射され,ダイクロアレイによって異なる波長帯の複数の出射軸方向に沿った光束に分割され,2次元センサ30に並列に入射される。
[式16]
cosθ0*α≦x≦cosθ0*α+2*sinθ0*β
とすることによって,開口幅Wを拡大し,光路長Lを縮小することができる。
[式17]
0≦y≦2*cosθ0*β
とすることによって,開口幅Wを拡大し,光路長Lを縮小することができる。また,3≦n≦Nとして,ダイクロM(n)の出射軸方向の端を,ダイクロM(n-1)の出射軸方向の端に対して,出射軸と反対方向にzだけずらし,
[式18]
0≦z≦2*sin(90-θ0-θ2)/cosθ2*β
とすることによって,開口幅Wを拡大し,光路長Lを縮小することができる。
実施例1では,複数のダイクロの間隔x,段差y,zの調整によって開口幅Wの拡大と,光路長Lの縮小を実現した。本実施例では,必ずしも段差配置をしない場合(y=z=0),すなわち,複数のダイクロを同一平面上に配置したとしても,より具体的には,各ダイクロの出射軸方向の端を同一平面上に並べたとしても,開口幅Wの拡大と,光路長Lの縮小を実現する手段を提案する。
[式19]
S↓=tan(2*θ0-90°)*tanθ0/(tanθ0-tan(2*θ0-90°))*(x-β/cos(90°-θ0)
で求められる。一方,各ダイクロの内部で配列軸正及び出射軸負の方向(左上方向)に進行する光束の出射軸負の方向(上方向)の移動距離S↑は,
[式20]
S↑=1/cosθ2*β*sin(90°-θ0-θ2)
で求められる。ここで,βは各ダイクロの厚さ,xは各ダイクロの間隔を示す。図9のように,S↓とS↑を相殺させるためには,S↓=S↑とするのが最も良い。そこで,このベストモードにおけるθ0をθ0(BM)とする。
[式21]
45°≦θ0≦2*θ0(BM)-45°
である。また,上記の2°のずれを考慮すると,より正確な条件は,
[式22]
45°≦θ0≦2*θ0(BM)-43°
となる。
ダイクロアレイが対象とする光束は,完全な平行光束であることは少なく,多くの場合は非平行光束である。すなわち,光束の進行(光路長)とともに,光束の径が一定ではなく,縮小及び拡大する。このため,以上の実施例では,様々な光束に対応できるように,光路長の縮小と開口幅の拡大を両立するダイクロアレイの構成を提案した。本実施例では,対象とする光束を具体的に定義し,ダイクロアレイによる対応可否を検討する。
[式23]
m=(g-f)/f
で表されるため,発光点像7の径d’は,
[式24]
d’=m*d=(g-f)/f*d
である。
[式25]
φ(s)=((-D-d)*f+d*g)/(f*g)*s+D
であり,g≦s(発光点像7以降)のときは,
[式26]
φ(s)=((D-d)*f+d*g)/(f*g)*s-D
と記述できる。
[式27]
φm(Δs)≦aW*α+bW*β
[式28]
Δs≧aL*α+bL*β
が満たされれば良い。式(27),(28)を変形すると,
[式29]
-bW/aW*β+1/aW*φm(Δs)≦α
[式30]
α≦-bL/aL*β+1/aL*Δs
となり,さらに式(3)を用いて変形すると,
[式31]
(sinθ0-bW/aW*cosθ0)*β+cosθ0/aW*φm(Δs)≦x
[式32]
x≦(sinθ0-bL/aL*cosθ0)*β+cosθ0/aL*Δs
である。N,θ0,n0,及びβが与えられたとき,式(29)及び(30)を満たすαに設定することにより,あるいは式(31)及び(32)を満たすxに設定することにより,ダイクロアレイは,対象となるφm(Δs)の光束を,一部をロスすることなく,良好に分割することができる。
以上の実施例では,単数のダイクロアレイによって,単数の光束を異なる波長帯を有する複数の光束に分割する場合を中心に説明したが,本発明はこれに限定されるものではない。本実施例では,単数のダイクロアレイによって,複数の光束をそれぞれ異なる波長帯を有する複数の光束に並列に分割する例を示す。
[式33]
p≧D
とする必要がある。したがって,
[式34]
f≦2.8*p
がF≦2.8の条件である。同様に,F≦2.0,1.4,1.0,及び0.7にするには,それぞれ次の式(35),(36),(37),及び(38)が条件である。
[式35]
f≦2.0*p
[式36]
f≦1.4*p
[式37]
f≦1.0*p
[式38]
f≦0.7*p
[式39]
f≦(1/(2.8*p)+1/g)-1
[式40]
f≦(1/(2.0*p)+1/g)-1
[式41]
f≦(1/(1.4*p)+1/g)-1
[式42]
f≦(1/(1.0*p)+1/g)-1
[式43]
f≦(1/(0.7*p)+1/g)-1
[式44]
X=1/π*(cos-1(V2/2-1)-sin(cos-1(V2/2-1))
として,
[式45]
V≦2*p/d’が条件となる。式(45)を,式(24)を用いて変形すると,
[式46]
f≧1/((2*p)/(V*d)+1)*g
と表すことができる。検出対象となる発光点1からの発光の検出を,両隣の発光点1からの発光の影響を受けずに実行するためには,図19において,2つの発光点像7の距離が,少なくとも発光点像の半径(又は径の半分)よりも大である必要がある。これを式(44),式(45)で表すと,X=0.39(39%),V=1となり,式(46)は,
[式47]
f≧1/(2*p/d+1)*g
で表すことができる。複数の発光点1からの発光を,より実効的に,独立に検出するためには,両隣からのクロストークの合計の割合を50%以下にすることが望ましく,そのためには,式(44),式(45)で表すと,X=0.25(25%),V=1.27となり,式(46)は,
[式48]
f≧1/((2*p)/(1.27*d)+1)*g
が条件である。さらに望ましくは,クロストークを0%にすることが良く,そのためには,式(44),式(45)で表すと,X=0(0%),V=2となり,式(46)は,
[式49]
f≧1/(p/d+1)*g
が条件である。
(1)発光点アレイのM個の発光点について,集光レンズアレイによって各発光点からの発光を集光したM個の光束を,それぞれ異なる波長成分を有するN個の光束に分割し,それぞれを同一方向に進行させる。
(2)発光点アレイのM個の発光点について,集光レンズアレイによって各発光点からの発光を集光したM個の光束を,それぞれ異なる波長成分を有するN個の光束に分割し,それぞれを各集光レンズの光軸方向に進行させる。
(3)発光点アレイのM個の発光点について,集光レンズアレイによって各発光点からの発光を集光したM個の光束を,それぞれ異なる波長成分に分割する方向を,発光点アレイ及び集光レンズアレイの配列方向と垂直方向とする。
(4)発光点アレイのM個の発光点について,集光レンズアレイによって各発光点からの発光を集光したM個の光束を,それぞれ異なる波長成分に分割する方向を,各集光レンズの光軸と垂直方向とする。
(5)発光点アレイのM個の発光点について,集光レンズアレイによって各発光点からの発光を集光したM個の光束を,それぞれ異なる波長成分に分割するN個のダイクロを,発光点アレイ及び集光レンズアレイの配列方向と垂直方向に配列する。
(6)発光点アレイのM個の発光点について,集光レンズアレイによって各発光点からの発光を集光したM個の光束を,それぞれ異なる波長成分に分割するN個のダイクロを,各集光レンズの光軸と垂直方向に配列する。
(7)発光点アレイのM個の発光点について,集光レンズアレイによって各発光点からの発光を集光したM個の光束を,それぞれ異なる波長成分にN個に分割したM×N個の光束をセンサに,再集光せずに,直接入射する。
(8)発光点アレイのM個の発光点について,各発光点からの発光を集光する集光レンズアレイの各集光レンズの光軸とセンサ面を垂直とする。
(9)N個の異なる種類のダイクロで構成し,各ダイクロをそれぞれ単一の部材で構成し,発光点アレイのM個の発光点からの発光を個別に集光したM個の光束を各ダイクロに並列に入射する。
(10)発光点アレイのM個の発光点からの発光を個別に集光したM個の光束をそれぞれ異なる波長成分にN個に分割したM×N個の光束を単一のセンサに並列に入射する。
[式50]
D≦aW*α+bW*β
[式51]
d’≦aW*α+bW*β
[式52]
g≧aL*α+bL*β
これらを式(31),(32)と同様に変形すると,
[式53]
(sinθ0-bW/aW*cosθ0)*β+cosθ0/aW*D≦x
[式54]
(sinθ0-bW/aW*cosθ0)*β+cosθ0/aW*d’≦x
[式55]
x≦(sinθ0-bL/aL*cosθ0)*β+cosθ0/aL*g
である。
2 集光レンズ
6 光束
7 発光点像
8 集光レンズアレイ
9 光束
10 ロングパスフィルタ
17~20 ダイクロ
30 2次元センサ
63 開口幅
64 光路長
70 光束
Claims (20)
- N≧2として,番号1,2,・・・,Nの複数のダイクロイックミラーを,第1の方向に,番号順に配列したダイクロイックミラーアレイであって,
前記複数のダイクロイックミラーの正面の法線ベクトルが,前記第1の方向の正の成分と,前記第1の方向と垂直な第2の方向の負の成分の和から構成され,
前記複数の法線ベクトルが互いに略平行であり,
0≦θ0≦90°として,前記複数の法線ベクトルと前記第2の方向と反対方向のなす角度の平均をθ0,
前記ダイクロイックミラーの基材の屈折率の平均をn0,
前記ダイクロイックミラーの基材の幅の平均をα,
前記ダイクロイックミラーの基材の厚さの平均をβ,
前記ダイクロイックミラーの間隔の平均をx,
2≦n≦Nとして,番号nのダイクロイックミラーの前記第2の方向の端を,番号n-1のダイクロイックミラーの前記第2の方向の端に対して,前記第2の方向と反対方向にずらす距離の平均をyz,とするとき,
θ0,n0,α,β,x,yzが,前記ダイクロイックミラーアレイの開口幅を拡大又は光路長を縮小できるように,予め定められた所定の関係を満足する,ダイクロイックミラーアレイ。 - θ2=sin-1(1/n0*sin(90°-θ0))として,
0≦yz≦2*sin(90°-θ0-θ2)/cosθ2*β
を満足する,請求項1に記載のダイクロイックミラーアレイ。 - θ2=sin-1(1/n0*sin(90°-θ0))として,
n=2のとき,
0≦yz≦2*cosθ0*β
3≦n≦Nのとき,
0≦yz≦2*sin(90°-θ0-θ2)/cosθ2*β
を満足する,請求項1に記載のダイクロイックミラーアレイ。 - cosθ0*α≦x≦cosθ0*α+2*sinθ0*β
を満足する,請求項1~3のいずれか1項に記載のダイクロイックミラーアレイ。 - θ2=sin-1(1/n0*sin(90°-θ0)),
S↓=tan(2*θ0-90°)*tanθ0/(tanθ0-tan(2*θ0-90°))*(x-β/cos(90°-θ0)
S↑=1/cosθ2*β*sin(90°-θ0-θ2)
として,S↑=S↓を満足するθ0をθ0(BM)とするとき,
45°≦θ0≦2*θ0(BM)-43°
を満足する,請求項1に記載のダイクロイックミラーアレイ。 - ダイクロイックミラーアレイ,及びセンサを含む光検出装置であって,
光束の前記センサに入射して検出される部分である実効光束の,光路長Δsの光路区間における最大径が,Δsの関数としてφm(Δs)で与えられ,
前記ダイクロイックミラーアレイが,N≧2として,番号1,2,・・・,Nの複数のダイクロイックミラーを,第1の方向に,番号順に配列して構成され,
前記複数のダイクロイックミラーの正面の法線ベクトルが,前記第1の方向の正の成分と,前記第1の方向と垂直な第2の方向の負の成分の和から構成され,
前記複数の法線ベクトルが互いに略平行であり,
0≦θ0≦90°として,前記複数の法線ベクトルと前記第2の方向と反対方向のなす角度の平均をθ0,
前記ダイクロイックミラーの基材の屈折率の平均をn0,
前記ダイクロイックミラーの基材の幅の平均をα,
前記ダイクロイックミラーの基材の厚さの平均をβ,
前記ダイクロイックミラーの間隔の平均をx,
2≦n≦Nとして,番号nのダイクロイックミラーの前記第2の方向の端を,番号n-1のダイクロイックミラーの前記第2の方向の端に対して,前記第2の方向と反対方向にずらす距離の平均をyz,とするとき,
Δs,φm(Δs),N,θ0,n0,α,β,x,yzが,前記少なくとも1個の光束を前記ダイクロイックミラーアレイ用いて前記センサで検出できるように,予め定められた所定の関係を満足する,光検出装置。 - θ1=sin-1(1/n0*sinθ0),
θ2=sin-1(1/n0*sin(90°-θ0)),
aW=cosθ0,
bW=-cosθ0*tanθ1,
aL=(N-1)*cosθ0+sinθ0,
bL=(N-2)/cosθ0*(2*sin(90°-θ0-θ2)+1-sin(θ0+θ2))+(N-2)*sinθ0+2*cosθ0
として,
(sinθ0-bW/aW*cosθ0)*β+cosθ0/aW*φm(Δs)≦x≦(sinθ0-bL/aL*cosθ0)*β+cosθ0/aL*Δs
を満足する,請求項6に記載の光検出装置。 - θ2=sin-1(1/n0*sin(90°-θ0))として,
0≦yz≦2*sin(90°-θ0-θ2)/cosθ2*β
を満足する,請求項6~7のいずれか1項に記載の光検出装置。 - θ2=sin-1(1/n0*sin(90°-θ0))として,
n=2のとき,
0≦yz≦2*cosθ0*β
3≦n≦Nのとき,
0≦yz≦2*sin(90°-θ0-θ2)/cosθ2*β
を満足する,請求項6~7のいずれか1項に記載の光検出装置。 - cosθ0*α≦x≦cosθ0*α+2*sinθ0*β
を満足する,請求項6~9のいずれか1項に記載の光検出装置。 - 前記光束が前記第2の方向に沿って前記ダイクロイックミラーアレイに入射され,
前記ダイクロイックミラーアレイより,前記光束が異なるN個の光束に前記第1の方向に分割された分割光束が,前記第2の方向に沿って出射され,
前記N個の分割光束が前記センサに並列に入射され,一括して検出される,請求項6~10のいずれか1項に記載の光検出装置。 - 前記光束は,前記第1の方向及び前記第2の方向の両方に垂直な第3の方向に配列する,M個の光束を有し,
前記M個の光束が前記第2の方向に沿って前記ダイクロイックミラーアレイに並列に入射され,
前記ダイクロイックミラーアレイより,前記M個の光束がそれぞれ異なるN個の光束に前記第1の方向に分割された分割光束が,前記第2の方向に沿って出射され,
前記M×N個の分割光束が前記センサに並列に入射され,一括して検出される,請求項11に記載の光検出装置。 - M≧1として,M個の発光点が配列した発光点アレイの発光点からの発光をそれぞれ個別に集光してM個の光束とするM個の集光レンズが配列した集光レンズアレイと,
N≧2として,N個のダイクロイックミラーが配列したダイクロイックミラーアレイと,
センサと,
を含む光検出装置であり,
前記ダイクロイックミラーアレイが,番号1,2,・・・,Nの複数のダイクロイックミラーを,第1の方向に,番号順に配列して構成され,
前記N個のダイクロイックミラーの正面の法線ベクトルが,前記第1の方向の正の成分と,前記第1の方向と垂直な第2の方向の負の成分の和から構成され,
前記N個の法線ベクトルが互いに略平行であり,
前記発光点アレイ及び前記集光レンズアレイの配列方向が,それぞれ,前記第1の方向と前記第2の方向の両方に垂直な第3の方向であり,
前記M個の発光点の有効径の平均をd,
前記M個の集光レンズの焦点距離の平均をf,
前記M個の集光レンズの有効径の平均をD,
M≧2の場合,前記M個の集光レンズの間隔の平均をp,
前記M個の集光レンズと前記センサの最大光路長の平均をg,
0≦θ0≦90°として,前記N個の法線ベクトルと前記第2の方向と反対方向のなす角度の平均をθ0,
前記N個のダイクロイックミラーの基材の屈折率の平均をn0,
前記N個のダイクロイックミラーの基材の幅の平均をα,
前記N個のダイクロイックミラーの基材の厚さの平均をβ,
前記N個のダイクロイックミラーの間隔の平均をx,
2≦n≦Nとして,番号nのダイクロイックミラーの前記第2の方向の端を,番号n-1のダイクロイックミラーの前記第2の方向の端に対して,前記第2の方向と反対方向にずらす距離の平均をyz,とするとき
d,f,D,p,g,θ0,N,n0,α,β,x,yzが,M個の発光を,前記ダイクロイックミラーアレイを用いて前記センサで検出できるように,予め定められた所定の関係を満足する,光検出装置。 - 前記M個の光束が前記第2の方向に沿って前記ダイクロイックミラーアレイに並列に入射され,
前記ダイクロイックミラーアレイより,前記M個の光束がそれぞれ異なるN個の光束に前記第1の方向に分割された分割光束が,前記第2の方向に沿って出射され,
前記M×N個の分割光束が前記センサに並列に入射され,一括して検出される,請求項13に記載の光検出装置。 - θ1=sin-1(1/n0*sinθ0),
θ2=sin-1(1/n0*sin(90°-θ0)),
aW=cosθ0,
bW=-cosθ0*tanθ1,
aL=(N-1)*cosθ0+sinθ0,
bL=(N-2)/cosθ0*(2*sin(90°-θ0-θ2)+1-sin(θ0+θ2))+(N-2)*sinθ0+2*cosθ0
d’=(g-f)/f*d
として,
(sinθ0-bW/aW*cosθ0)*β+cosθ0/aW*D≦x,及び,
(sinθ0-bW/aW*cosθ0)*β+cosθ0/aW*d’≦x≦(sinθ0-bL/aL*cosθ0)*β+cosθ0/aL*g
を満足する,請求項13~14のいずれか1項に記載の光検出装置。 - θ2=sin-1(1/n0*sin(90°-θ0))として,
0≦yz≦2*sin(90°-θ0-θ2)/cosθ2*β
を満足する,請求項13~15のいずれか1項に記載の光検出装置。 - θ2=sin-1(1/n0*sin(90°-θ0))として,
n=2のとき,
0≦yz≦2*cosθ0*β
3≦n≦Nのとき,
0≦yz≦2*sin(90°-θ0-θ2)/cosθ2*β
を満足する,請求項13~16のいずれか1項に記載の光検出装置。 - cosθ0*α≦x≦cosθ0*α+2*sinθ0*β
を満足する,請求項13~17のいずれか1項に記載の光検出装置。 - M≧2であり,
f≧1/((2*p)/(1.27*d)+1)*g
を満足する,請求項13~18のいずれか1項に記載の光検出装置。 - M≧2であり,
f≧1/(p/d+1)*g
を満足する,請求項13~18のいずれか1項に記載の光検出装置。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201680080052.1A CN108604017B (zh) | 2016-02-22 | 2016-02-22 | 二向色镜阵列 |
US16/077,507 US11061243B2 (en) | 2016-02-22 | 2016-02-22 | Dichroic-mirror array |
JP2018501421A JP6523547B2 (ja) | 2016-02-22 | 2016-02-22 | ダイクロイックミラーアレイ |
PCT/JP2016/055032 WO2017145231A1 (ja) | 2016-02-22 | 2016-02-22 | ダイクロイックミラーアレイ |
EP16891390.3A EP3422083A4 (en) | 2016-02-22 | 2016-02-22 | ARRANGEMENT OF DICHROITIC MIRROR |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2016/055032 WO2017145231A1 (ja) | 2016-02-22 | 2016-02-22 | ダイクロイックミラーアレイ |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2017145231A1 true WO2017145231A1 (ja) | 2017-08-31 |
Family
ID=59686128
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2016/055032 WO2017145231A1 (ja) | 2016-02-22 | 2016-02-22 | ダイクロイックミラーアレイ |
Country Status (5)
Country | Link |
---|---|
US (1) | US11061243B2 (ja) |
EP (1) | EP3422083A4 (ja) |
JP (1) | JP6523547B2 (ja) |
CN (1) | CN108604017B (ja) |
WO (1) | WO2017145231A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2020075293A1 (ja) * | 2018-10-12 | 2020-04-16 | 株式会社日立ハイテクノロジーズ | ダイクロイックミラーアレイ及び光検出装置 |
WO2024057455A1 (ja) * | 2022-09-14 | 2024-03-21 | 株式会社日立ハイテク | 光学装置 |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11333597B2 (en) | 2016-04-26 | 2022-05-17 | Cytek Biosciences, Inc. | Compact multi-color flow cytometer having compact detection module |
CN114636472A (zh) * | 2016-07-25 | 2022-06-17 | 厦泰生物科技公司 | 紧凑波长检测模块 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH08910A (ja) * | 1994-06-23 | 1996-01-09 | Ishigaki Mech Ind Co | 汚泥等の凝集混和装置 |
JPH09274166A (ja) * | 1996-04-04 | 1997-10-21 | Copal Co Ltd | 液晶投射装置 |
JPH10221647A (ja) * | 1997-02-05 | 1998-08-21 | Ushio Inc | 偏光照明装置および偏光ビームスプリッターアレイ |
JP2002517011A (ja) * | 1998-05-28 | 2002-06-11 | ザ ジェネラル ホスピタル コーポレーション | ヘテロダイン共焦点顕微鏡 |
JP2011090036A (ja) * | 2009-10-20 | 2011-05-06 | Citizen Holdings Co Ltd | 光学素子および光源装置 |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH089101A (ja) | 1994-06-16 | 1996-01-12 | Fuji Xerox Co Ltd | カラー画像読取装置 |
JP3835089B2 (ja) * | 1999-12-07 | 2006-10-18 | セイコーエプソン株式会社 | 投射型カラー表示装置 |
US6637888B1 (en) * | 2002-01-24 | 2003-10-28 | Delta Electronics, Inc. | Full color rear screen projection system using a single monochrome TFT LCD panel |
JP2003241304A (ja) * | 2002-02-14 | 2003-08-27 | Seiko Epson Corp | プロジェクタ |
JP4109174B2 (ja) | 2003-09-17 | 2008-07-02 | 浜松ホトニクス株式会社 | 分光装置 |
JP5628038B2 (ja) | 2007-10-16 | 2014-11-19 | コーニンクレッカ フィリップス エヌ ヴェ | コンパクトな照射スキームの生成及び一体化に対する装置、システム及び方法 |
CN201464352U (zh) * | 2009-07-03 | 2010-05-12 | 陈建红 | 一种用于理化分析仪分光及光电转换的组件 |
US8357281B2 (en) * | 2009-09-21 | 2013-01-22 | Advanced Analytical Technologies, Inc. | Multi-wavelength fluorescence detection system for multiplexed capillary electrophoresis |
CN102033413B (zh) | 2009-09-25 | 2012-09-05 | 李志扬 | 基于随机相长干涉原理的立体显示装置 |
JP2012242117A (ja) | 2011-05-16 | 2012-12-10 | Hamamatsu Photonics Kk | 分光装置 |
CN202995141U (zh) | 2012-12-13 | 2013-06-12 | 王宇 | 半导体激光器阵列光束整形结构 |
CN103996973B (zh) * | 2014-05-09 | 2017-01-11 | 西安炬光科技有限公司 | 一种高功率半导体激光器的扩束装置 |
EP2966490A1 (de) * | 2014-07-08 | 2016-01-13 | Fisba Optik Ag | Vorrichtung zur Erzeugung von Licht mit mehreren Wellenlängen, Verfahren zur Herstellung einer Vorrichtung, Verwendung eines Positionierungsmoduls, Verfahren zur Kombination von Lichtstrahlen und Vorrichtung zur Erzeugung von Licht mit mehreren Wellenlängen |
CN105449513A (zh) * | 2015-12-21 | 2016-03-30 | 长春理工大学 | 多对各具有分光镜组阶梯排布单管合束半导体激光器 |
-
2016
- 2016-02-22 WO PCT/JP2016/055032 patent/WO2017145231A1/ja active Application Filing
- 2016-02-22 JP JP2018501421A patent/JP6523547B2/ja active Active
- 2016-02-22 CN CN201680080052.1A patent/CN108604017B/zh active Active
- 2016-02-22 US US16/077,507 patent/US11061243B2/en active Active
- 2016-02-22 EP EP16891390.3A patent/EP3422083A4/en active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH08910A (ja) * | 1994-06-23 | 1996-01-09 | Ishigaki Mech Ind Co | 汚泥等の凝集混和装置 |
JPH09274166A (ja) * | 1996-04-04 | 1997-10-21 | Copal Co Ltd | 液晶投射装置 |
JPH10221647A (ja) * | 1997-02-05 | 1998-08-21 | Ushio Inc | 偏光照明装置および偏光ビームスプリッターアレイ |
JP2002517011A (ja) * | 1998-05-28 | 2002-06-11 | ザ ジェネラル ホスピタル コーポレーション | ヘテロダイン共焦点顕微鏡 |
JP2011090036A (ja) * | 2009-10-20 | 2011-05-06 | Citizen Holdings Co Ltd | 光学素子および光源装置 |
Non-Patent Citations (1)
Title |
---|
See also references of EP3422083A4 * |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2020075293A1 (ja) * | 2018-10-12 | 2020-04-16 | 株式会社日立ハイテクノロジーズ | ダイクロイックミラーアレイ及び光検出装置 |
GB2592141A (en) * | 2018-10-12 | 2021-08-18 | Hitachi High Tech Corp | Dichroic mirror array and light detecting device |
JPWO2020075293A1 (ja) * | 2018-10-12 | 2021-12-02 | 株式会社日立ハイテク | ダイクロイックミラーアレイ及び光検出装置 |
GB2592141B (en) * | 2018-10-12 | 2022-10-12 | Hitachi High Tech Corp | Dichroic mirror array and light detecting device |
US11644680B2 (en) | 2018-10-12 | 2023-05-09 | Hitachi High-Tech Corporation | Dichroic mirror array and light detecting device |
WO2024057455A1 (ja) * | 2022-09-14 | 2024-03-21 | 株式会社日立ハイテク | 光学装置 |
Also Published As
Publication number | Publication date |
---|---|
EP3422083A1 (en) | 2019-01-02 |
JPWO2017145231A1 (ja) | 2018-11-15 |
US20190064535A1 (en) | 2019-02-28 |
JP6523547B2 (ja) | 2019-06-05 |
CN108604017A (zh) | 2018-09-28 |
EP3422083A4 (en) | 2019-11-13 |
CN108604017B (zh) | 2022-05-17 |
US11061243B2 (en) | 2021-07-13 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US11543355B2 (en) | Light-emitting detection device | |
JP6525856B2 (ja) | 光源光学系およびこれを用いた投射型表示装置 | |
WO2017145231A1 (ja) | ダイクロイックミラーアレイ | |
JP6510044B2 (ja) | 顕微鏡用の検出装置 | |
US10371632B2 (en) | Data correction method in fine particle measuring device and fine particle measuring device | |
JP4883549B2 (ja) | 分光器 | |
US20130229654A1 (en) | Illumination optical system, light irradiation apparatus for spectrometory, and spectometer | |
KR20100018984A (ko) | 빔 스캐닝 방식의 크로마틱 공초점 현미경 | |
US8767200B2 (en) | Luminous flux branching element and mask defect inspection apparatus | |
WO2019035047A1 (en) | SPECTROMETER SCALE COMPACT FREE SHAPE | |
KR102137428B1 (ko) | 노광 광학계, 노광 헤드 및 노광 장치 | |
WO2022107725A1 (ja) | 画像観察装置及びその照明光学系 | |
US6839179B2 (en) | Imaging system and method for reduction of interstitial images | |
US20060007402A1 (en) | Illumination lens system and projection system including the same | |
JPH08237436A (ja) | カラー画像読み取り装置 | |
US11644680B2 (en) | Dichroic mirror array and light detecting device | |
CN110032033B (zh) | 光射出装置以及图像显示系统 | |
TWI699510B (zh) | 增加用於檢測和度量之高度感測器之動態範圍 | |
JP2011128108A (ja) | 分光器、及び、それを備えた光学装置 | |
KR20170020420A (ko) | 조리개 및 타겟의 회전된 경계선 | |
WO2024057455A1 (ja) | 光学装置 | |
JP2007101310A (ja) | 位置検出装置 | |
JP7329658B2 (ja) | 発光検出装置 | |
JP2020076649A (ja) | 分光光学系、分光計測システム、及び、半導体検査方法 | |
JP7075974B2 (ja) | 発光検出装置 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 2018501421 Country of ref document: JP |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2016891390 Country of ref document: EP |
|
ENP | Entry into the national phase |
Ref document number: 2016891390 Country of ref document: EP Effective date: 20180924 |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 16891390 Country of ref document: EP Kind code of ref document: A1 |