JP5307080B2 - Total light measurement system, total light measurement device, total light measurement method - Google Patents

Description

  The present invention relates to a measurement system, a measurement apparatus, and a measurement method for measuring the total amount of light generated from a light source including an LED (Light Emitting Diode).

  Generally, in order to measure the total amount of light from a light source, a light amount measurement system including an integrating sphere is used. The value obtained by the light quantity measurement system provided with this integrating sphere is used as a standard indicating the total light quantity of the light source.

  Here, the integrating sphere is a member in which a diffuse reflection material is applied to the inner wall surface of a housing having a spherical space inside. When a light source is arranged in the inner space of the integrating sphere and this light source is turned on, all the light emitted from the light source is reflected in a diffused state on one of the inner wall surfaces of the integrating sphere. Since the inner space of the integrating sphere is spherical, light reflection occurs repeatedly, and light diffuses at each reflection. Therefore, the amount per unit area of light irradiated on the inner wall surface of the integrating sphere is the same in any part. The light intensity measurement system with an integrating sphere uses the properties of this integrating sphere, and the total light intensity of the light source placed inside the integrating sphere is proportional to the light intensity acquired from a part of the inner wall of the integrating sphere. , A sensor for measuring the amount of light is arranged on a part of the inner wall surface of the integrating sphere, and the value measured by the sensor is used as the total amount of light of the light source. The total light quantity measured by a light quantity measurement system equipped with such an integrating sphere is a relative value that varies depending on the size of the integrating sphere and the type of sensor that measures the quantity of light. The total light quantity of the light source is absolutely evaluated based on the comparison with the standard value.

  In such a light quantity measurement system equipped with an integrating sphere, the light source must be arranged in a pseudo floating state in the space inside the integrating sphere, so that it is difficult to mount the light source. Therefore, it takes a long time to acquire the total amount of light for a large number of light sources.

  Therefore, Patent Document 1 discloses an invention relating to the following light quantity measurement system. That is, the light quantity measurement system includes an integrating hemisphere in which a light diffusing material is applied to a hemispherical inner wall surface, and a flat mirror installed so as to cover the opening of the integrating hemisphere. The light source is disposed at the center of the mirror. According to such a configuration, the integration hemisphere and the virtual image of the integration hemisphere are present by the mirror as if the integration sphere exists, and the light source is fixed in the space inside the integration sphere simply by placing the light source at the center of the mirror. Can be realized. Therefore, it is possible to simplify the work of attaching the light source.

JP 2009-103654 A

  However, a sufficiently large integrating hemisphere is required to sufficiently diffuse and radiate light emitted from the light source, and a large space is required to measure one light source.

  In addition, barium sulfate, which is generally used as a diffuse reflection material, has characteristics that change greatly depending on the storage conditions (for example, humidity at the storage location), so the integrating sphere and integrating hemisphere must be stored strictly. In addition, it must be handled carefully during measurement.

  In addition, even with careful storage and handling, the properties of the diffuse reflective material will change over time, so it is often necessary to obtain the absolute value of the total amount of light source accurately. It is necessary to calibrate using a light source.

  In addition, it is difficult to measure simply because a relatively long time is required for the measurement.

  Therefore, the applicant first invented an invention relating to a total light quantity measurement system, a total light quantity measurement device, and a total light quantity measurement method that are easy to store and measure and that can easily measure the total light quantity of a light source stably. Is disclosed.

  The present invention was developed in order to apply the previous invention in a light source production factory or the like, and for a light source produced in a state of being attached to a substrate in an industrial production process, in a short time and accurately. The object is to provide a total light quantity measuring system, a total light quantity measuring device, and a total light quantity measuring method capable of continuously measuring the total light quantity.

  In order to achieve the above object, the total light quantity measurement system according to the present invention is a total light quantity measurement system for measuring the total light quantity of light emitted from a light source attached to a substrate, and the light source can be arranged inward. A first housing having a first space, the inner surface having a reflection surface portion that regularly reflects light emitted from the light source disposed in the first space, and direct light that directly reaches from the light source and the reflection A first housing having a first opening through which reflected light reaching after being reflected by the surface portion passes, and a first insertion hole for disposing a light source in the first space on a surface facing the first opening; A second housing having a second space in which a light source can be arranged inward, the second opening having the same shape and the same area as the first opening, and the light source on the surface facing the second opening A second insertion hole for disposing in the second space, and disposing in the second space. A second housing having an absorption surface portion on the inner surface that absorbs light so as to pass only direct light that directly radiates from the light source and directly reaches the second opening; and a light amount of light that passes through the first opening. A detecting means for detecting one light quantity and a second light quantity that is the light quantity of light passing through the second opening, and calculating the total light quantity of the light source based on the detected first light quantity and second light quantity. Arrangement is made so as to surround the entire circumference of the computing means and the first insertion hole, and when the light source is arranged in the first space, the gap between the substrate and the first casing is filled. A flexible first light blocking member that prevents stray light from entering the first space from the outside of the body, and a light source are disposed in the second space while surrounding the entire circumference of the second insertion hole When filling the gap between the substrate and the second housing, It is characterized in that the and a second shielding member with a flexibility to prevent entry into the second space of the stray light.

  As a result, even when there are irregularities or other minute parts on the surface of the substrate around the light source, or when the substrate is warped or distorted, when the light source is placed in the first space, Because the flexible first light shielding member fills or covers the gap generated between the first housing and the substrate surface, stray light that is light other than the light source can enter the inside of the first housing. It becomes possible to suppress as much as possible.

  Further, as in the case of the first casing described above, the flexible second light shielding member fills or covers the gap generated between the second casing around the second insertion hole and the substrate surface. It is possible to prevent the intrusion into the second casing as much as possible.

  Accordingly, the total light amount of the light source attached to the substrate can be accurately measured without detecting noise due to stray light.

  Furthermore, support means for supporting the substrate by applying a force against the pressing force applied to the substrate when the first housing and the second housing are pressed against the substrate may be provided.

  According to this, in the case of a flexible substrate or a fragile substrate, the gap between the substrate and the first housing and the second housing is filled or covered with the first light shielding member and the second light shielding member. A problem that the substrate is deformed or damaged by the pressing force applied to the substrate can be avoided as much as possible by the support means.

  Further, the support means has a cylindrical shape that is in contact with the back surface of the substrate opposite to the first housing and the second housing so as to surround the first insertion hole and the second insertion hole, and has a light shielding property. You may provide a contact part.

  According to this, since the front surface of the substrate is shielded by the first light shielding member and the second light shielding member, and the back surface of the substrate is shielded by the contact portion, the light source is attached to the substrate made of the light transmitting member. Even when the stray light is transmitted through the substrate, it is possible to prevent the stray light from entering the first space and the second space. Therefore, it is possible to accurately measure the total light quantity of the light source.

  A first spacer that contacts the surface of the substrate and determines a distance between the substrate and the first housing; and a second spacer that contacts the surface of the substrate and determines a distance between the substrate and the second housing. May be provided.

  According to this, since the distance between the substrate and the first housing is determined by the first spacer, the positional relationship between the detection means and the light source is accurately defined even for the light source attached to the substrate. It becomes possible to ensure reproducibility. Similarly, the second spacer can accurately define and reproduce the positional relationship between the detection means and the light source, so that the measurement by the misalignment of the light source that occurs when measuring the total amount of light using two housings. It is possible to avoid inaccuracy of the value as much as possible.

  Furthermore, since the distance between the first housing and the substrate is determined by the first spacer, it is possible to prevent the flexible first light shielding member from being deformed more than necessary. Therefore, it is possible to avoid a phenomenon in which stray light enters the first space due to excessive deformation of the first light shielding member and a gap between the substrate and the first light shielding member. Moreover, it can avoid that a 1st light-shielding member deteriorates early by repeating an excessive deformation | transformation. The same effect can also be achieved by the second spacer.

  In order to achieve the above object, the total light amount measuring device according to the present invention is a total light amount measuring device for measuring the total light amount of light emitted from a light source attached to a substrate, and the light source is disposed inward. A first housing having a first space that has a reflection surface portion that regularly reflects light emitted from a light source disposed in the first space, and direct light that reaches directly from the light source; A first housing having a first opening through which reflected light reaching after being reflected by the reflecting surface portion passes, and a first insertion hole for arranging a light source in the first space on a surface facing the first opening And a second housing having a second space in which a light source can be arranged inward, the second opening having the same shape and the same area as the first opening, and a light source on a surface facing the second opening. A second insertion hole for arranging in the second space, and light arranged in the second space A first housing that has an absorption surface portion that absorbs light so as to pass only direct light that directly radiates from the first opening and passes through the first opening. A detecting means for detecting a light amount and a second light amount that is a light amount of light passing through the second opening; and a light source disposed in the first space, so as to surround the entire periphery of the first insertion hole. A flexible first light shielding member that fills a gap between the substrate and the first housing when disposed and prevents stray light from entering the first space from the outside of the first housing; and the second It is arranged so as to surround the entire periphery of the insertion hole, and when a light source is arranged in the second space, the gap between the substrate and the second casing is filled and stray light from the outside of the second casing is A flexible second light shielding member that prevents entry into two spaces That.

  As a result, even when there are irregularities or other minute parts on the surface of the substrate around the light source, or when the substrate is warped or distorted, when the light source is placed in the first space, Because the flexible first light shielding member fills or covers the gap generated between the first housing and the substrate surface, stray light that is light other than the light source can enter the inside of the first housing. It becomes possible to suppress as much as possible.

  Further, since the flexible second light shielding member fills or covers the gap generated between the second housing around the second insertion hole and the substrate surface, stray light may enter the inside of the second housing. Can be suppressed as much as possible.

  Therefore, it is possible to provide data for accurately measuring the total light amount of the light source without detecting noise due to stray light.

  In order to achieve the above object, the total light amount measuring method according to the present invention is a total light amount measuring method applied to a total light amount measuring system for measuring the total light amount of light emitted from a light source attached to a substrate. The total light quantity measuring system is a first housing having a first space in which a light source can be disposed inward, and is a reflection that regularly reflects light emitted from the light source disposed in the first space. A first opening having a surface portion on the inner surface, through which direct light directly reaching from the light source and reflected light reaching after being reflected by the reflecting surface portion passes, and the light source is placed on the surface facing the first opening in the first space A first housing having a first insertion hole for disposing the light source and a second housing having a second space in which a light source can be disposed inward, having the same shape and the same area as the first opening. A light source is disposed on the second opening and a surface facing the second opening. And an absorption surface portion that absorbs light so that only direct light that directly radiates from the light source disposed in the second space and directly reaches the second opening is allowed to pass through. A second casing; a first light amount that is a light amount of light that passes through the first opening; and a detection unit that detects a second light amount that is the light amount of light that passes through the second opening. A first arrangement step of arranging a light source in the first space through one insertion hole; and stray light from outside the first housing when the light source is arranged in the first space surrounding the entire circumference of the first insertion hole A first light-blocking step for preventing the first light-blocking member from entering the first space, a first detection step for detecting the first light quantity by the detecting means, and a light source in the second space through the second insertion hole. A second arranging step of arranging the second insertion hole A second light shielding step that surrounds the periphery and prevents the stray light from entering the second space from the outside of the second housing when the light source is disposed in the second space by the second light shielding member; and A second detection step of detecting a second light amount; and a calculation step of calculating a total light amount of the light source by a calculation means based on the detected first light amount and the second light amount.

  As a result, even when there are irregularities or other minute parts on the surface of the substrate around the light source, or when the substrate is warped or distorted, when the light source is placed in the first space, Because the flexible first light shielding member fills or covers the gap generated between the first housing and the substrate surface, stray light that is light other than the light source can enter the inside of the first housing. It becomes possible to suppress as much as possible.

  Further, since the flexible second light shielding member fills or covers the gap generated between the second housing around the second insertion hole and the substrate surface, stray light may enter the inside of the second housing. Can be suppressed as much as possible.

  Accordingly, the total light amount of the light source attached to the substrate can be accurately measured without detecting noise due to stray light.

  According to the present invention, the total amount of light of the light source attached to the substrate can be measured at high speed and accurately.

FIG. 1 is a diagram schematically showing a total light quantity measurement system. FIG. 2 is a perspective view showing the first housing by cutting away. FIG. 3 is a plan view schematically showing a cross section near the first insertion hole of the first housing. FIG. 4 is a plan view schematically showing a cross section near the first insertion hole in a state where the light source is arranged in the first space. FIG. 5 is a perspective view showing the second housing by cutting away. FIG. 6 is a plan view schematically showing a cross section in the vicinity of the second insertion hole of the second housing. FIG. 7 is a plan view schematically showing a cross section in the vicinity of the second insertion hole in a state where the light source is arranged in the second space. FIG. 8 is a diagram schematically showing the total light quantity measurement system in order to show the flow of the total light quantity measurement method. FIG. 9 is a diagram schematically showing the total light quantity measurement system in order to show the flow of the total light quantity measurement method. FIG. 10 is a diagram schematically illustrating a reflection state and an absorption state of light emitted from the light source. FIG. 11 is a diagram schematically showing the total light quantity measurement system. FIG. 12 is a diagram schematically showing the total light quantity measurement system in order to show the flow of the total light quantity measurement method.

  Next, the total light quantity measuring system according to the present invention will be described with reference to the drawings.

(Embodiment 1)
FIG. 1 is a diagram schematically showing a total light quantity measurement system.

  As shown in the figure, the total light quantity measurement system 100 is a system for measuring the total light quantity of light emitted from the light source 300, and includes a first casing 101, a second casing 102, a detection means 103, And an arithmetic means 104. Further, the total light quantity measurement system 100 includes a first light shielding member 141 and a second light shielding member 142.

  FIG. 2 is a perspective view showing the first housing by cutting away.

  The first housing 101 is a member that reflects part of light emitted from the light source 300 by regular reflection and guides the light to the first opening 111, and includes a reflective surface portion 113.

  The reflective surface portion 113 is a portion that regularly reflects light emitted from the light source 300 disposed in the first space 110. The reflection surface portion 113 may be provided with a surface (corresponding to the inner surface of the first housing 101) that reflects the light as much as possible without irregular reflection, and may have a so-called mirror surface. In the case of the present embodiment, the reflecting surface portion 113 is a mirror-finished inner surface of the first housing 101 made of metal. Therefore, in FIG. 1 and FIG. 2, the reflection surface portion 113 is described as a separate body, but the reflection surface portion 113 may be integrated with the first housing 101.

  The reflection surface portion 113 has a shape such that the light emitted from the light source 300 reaches the first opening 111 with a single reflection.

  The reflective surface portion 113 is not limited to the truncated cone shape, and the reflective surface portion 113 may be a curved surface that curves from the light source 300 toward the first opening 111. As the curved reflecting surface 113, for example, the reflecting surface 113 having a paraboloid on the surface can be listed. When the reflecting surface portion 113 has a parabolic surface, if the light source 300 is placed at the focal point of the parabolic surface, the reflected light emitted from the light source 300 and reflected by the parabolic surface of the reflecting surface portion 113 becomes parallel to the symmetry axis of the parabolic surface. It goes to the first opening 111. In this case, the reflected light can reach the first opening 111 vertically by one reflection.

  The first space 110 is a space provided in the first housing 101 and in which the light source 300 is arranged. That is, the first space 110 is a space formed by being surrounded by the reflection surface portion 113 of the first housing 101. In the case of the present embodiment, the first space 110 has a truncated cone shape. That is, the first housing 101 has a cylindrical shape that forms the first space 110 having a truncated cone shape.

  The first opening 111 is an opening for establishing communication between the first space 110 and another adjacent space. The direct light directly reaching from the light source 300 and the reflected light reaching after being reflected by the reflecting surface portion 113. It is an opening that passes through. In the case of the present embodiment, the bottom surface portion (circular portion having a large area) of the first space 110 having a truncated cone shape corresponds to the first opening 111.

  Here, the total light quantity of light emitted from the light source 300 arranged in the first space 110 and passing through the first opening 111 will be described as a first light quantity. The first light amount is the sum of the light amount of direct light that directly reaches the first opening 111 and passes through the first opening 111 and the light amount of reflected light that passes through the first opening 111 after being reflected by the reflecting surface portion 113.

  The first housing 101 includes a first insertion hole 112 for disposing the light source 300 in the first space 110 on a surface facing the first opening 111.

  In the present embodiment, the first insertion hole 112 is a hole that penetrates the first housing 101 and is connected to the first space 110, and is an upper surface portion (small area) of the frustoconical first space 110. A circular portion) corresponds to the first insertion hole 112.

  Thus, by providing the first insertion hole 112, the light source 300 can be easily arranged in the first space 110, and by aligning the position of the light source 300 with respect to the first housing 101, the first opening 111 and The position with the light source 300 can be easily adjusted.

  In the case of the present embodiment, the thickness of the first housing 101 on the first insertion hole 112 side is thinner than the thickness on the first opening 111 side. According to this, when the light source 300 is inserted into the first insertion hole 112, it is possible to avoid as much as possible interference between the wiring on the substrate 302 and other components around the light source 300 and the first housing 101. It becomes possible. Further, by making the first opening 111 side thick, the rigidity of the first housing 101 is increased, and the mounting strength of the first detector 114 and the like is increased.

  Note that the first casing 101 may be a truncated cone-shaped cylinder having a uniform thickness and extending along the first space 110.

  FIG. 3 is a plan view schematically showing a cross section near the first insertion hole of the first housing.

  FIG. 4 is a plan view schematically showing a cross section near the first insertion hole in a state where the light source is arranged in the first space.

  The first light shielding member 141 shown in these drawings is arranged so as to surround the entire circumference of the first insertion hole 112, and the light source 300 (not shown) is arranged in the first space 110 as shown in FIG. At this time, it is a flexible member that fills the gap between the substrate 302 and the first housing 101 and prevents stray light from entering the first space 110 from the outside of the first housing 101. Note that FIG. 3 shows the first light shielding member 141 in a free state that is not pressed against the substrate 302.

  In the present embodiment, the first light shielding member 141 is an annular (cylindrical) member having a rectangular cross section, and is fixedly attached to the end surface of the first housing 101. In addition, when the first light shielding member 141 is pressed against the substrate 302, the first light shielding member 141 flexibly follows the surface shape of the substrate 302 (including shapes of other components, wirings, etc.), and It is a member that can be filled without any gaps. As a material constituting the first light shielding member 141, a member having a high light shielding property is preferable. Specific examples of the member constituting the first light shielding member 141 include a member made of rubber or elastomer that is kneaded with carbon or the like to improve the light shielding property and has flexibility. Furthermore, a member made of foamed resin such as sponge may be used. In the case of the foamed member, it is desirable that the bubbles are closed cells. This is because, in the case of open cells, the possibility of transmission of stray light is increased. In addition, the first light shielding member 141 may be a film-like or cloth-like member. In this case, the first light shielding member 141 is not flexible, such as rubber, but is flexible between the first housing 101 and the substrate 302 by the flexibility of the first light shielding member 141 in the thickness direction. Covering the gap prevents stray light from entering.

  In the present embodiment, a first spacer 116 is provided around the first insertion hole 112 of the first housing 101. The first spacer 116 is a member that contacts the surface of the substrate 302 and determines the distance between the substrate 302 and the first housing 101. In the case of the present embodiment, the first spacer 116 is an annular member provided integrally with the first housing 101, and is disposed inside the first light shielding member 141.

  The first spacer 116 is made of a hard member having no flexibility, and the distance between the first housing 101 and the substrate 302 can be determined as shown in FIG. Therefore, the distance between the light source 300 attached to the substrate 302 and the first detector 114 provided in the first opening 111 of the first housing 101 is accurately determined while securing the shrinkage allowance of the first light shielding member 141. Can be secured. In addition, this can prevent deformation of the strength such as excessive compression of the first light shielding member 141, and strong distortion occurs in the first light shielding member 141, so that the first housing 101 and the substrate 302 are not deformed. It is possible to prevent the first light shielding member 141 from being deteriorated due to excessive deformation of the first light shielding member 141.

  The first spacer 116 is not limited to an annular shape as long as the gap between the first housing 101 and the substrate 302 can be determined. For example, a plurality of pins arranged between the first housing 101 and the substrate 302 may be used.

  FIG. 5 is a perspective view showing the second housing by cutting away.

  The second housing 102 is a member that allows only direct light that is emitted from the light source 300 and directly reaches the second opening 121 to pass therethrough, and includes an absorption surface portion 123.

  The absorption surface portion 123 is a portion that absorbs light emitted from the light source 300 disposed in the second space 120. The absorption surface part 123 should just be provided with the surface (it corresponds to the inner surface of the 2nd housing | casing 102) which absorbs light as much as possible, without reflecting light. In the case of the present embodiment, the absorbing surface portion 123 is formed by applying electroless black plating to the inner surface of the second housing 102 made of metal. Accordingly, in FIG. 1 and FIG. 3, the absorption surface portion 123 is described as a separate body, but the absorption surface portion 123 may be integrated with the second housing 102.

  Here, the electroless black plating is a process for growing a film on the surface of the second housing 102, and is widely used in the field of optical equipment. The film obtained by electroless black plating can absorb not only visible light but also light in the wavelength region of ultraviolet rays and near infrared rays due to its own black color and fine irregularities on the surface.

  It should be noted that the term “absorption” described in the present specification and claims does not mean that incident light such as a black body or a complete cavity is not reflected at all. This means that the reflectance is small.

  The second space 120 is a space provided in the second housing 102 and in which the light source 300 is disposed. That is, the second space 120 is a space formed by being surrounded by the absorption surface portion 123 of the second housing 102. In the case of the present embodiment, the second space 120 has a truncated cone shape having the same shape and the same volume as the first space 110. That is, the second housing 102 has a cylindrical shape that forms the second space 120 having a truncated cone shape.

  The second opening 121 is an opening for establishing communication between the second space 120 and another adjacent space, and has the same shape and the same area as the first opening through which direct light directly reaching from the light source 300 passes. It is. In the case of the present embodiment, the bottom surface portion (circular portion having a large area) of the truncated conical second space 120 corresponds to the second opening 121.

  Here, the total light amount of light emitted from the light source 300 arranged in the second space 120 and passing through the second opening 121 will be described as a second light amount below. The second light amount is the amount of direct light that directly reaches the second opening 121 and passes through the second opening 121, but this is not exact and may include reflected light from the absorption surface portion 123. .

  In the second housing 102, a second insertion hole 122 for placing the light source 300 in the second space 120 is provided on the surface facing the second opening 121.

  In the case of the present embodiment, the second insertion hole 122 is a hole that penetrates the second housing 102 and is connected to the second space 120, and is an upper surface portion (small area) of the second space 120 having a truncated cone shape. A circular portion) corresponds to the second insertion hole 122.

  Thus, by providing the second insertion hole 122, the light source 300 can be easily arranged in the second space 120, and by aligning the position of the light source 300 with respect to the second housing 102, the second opening 121 and The position with the light source 300 can be easily adjusted. Furthermore, since the shape and volume of the first space 110 and the second space 120 are the same, the positional relationship between the second opening 121 and the light source 300 is matched with the positional relationship between the first opening 111 and the light source 300. It becomes easy.

  In the case of the present embodiment, the thickness of the second housing 102 on the second insertion hole 122 side is thinner than the thickness on the second opening 121 side. The effect of reducing the thickness on the second insertion hole 122 side is the same as in the case of the first housing 101.

  FIG. 6 is a plan view schematically showing a cross section in the vicinity of the second insertion hole of the second housing.

  FIG. 7 is a plan view schematically showing a cross section in the vicinity of the second insertion hole in a state where the light source is arranged in the second space.

  The second light shielding member 142 shown in these drawings is arranged so as to surround the entire periphery of the second insertion hole 122, and as shown in FIG. 7, a light source 300 (not shown) is arranged in the second space 120. At this time, it is a flexible member that fills the gap between the substrate 302 and the second housing 102 and prevents stray light from entering the second space 120 from the outside of the second housing 102. FIG. 6 shows the second light shielding member 142 in a free state that is not pressed against the substrate 302. In addition, the material and operational effects of the second light shielding member 142 are the same as those of the first light shielding member 141.

  In the present embodiment, a second spacer 126 is provided around the second insertion hole 122 of the second housing 102. The second spacer 126 is a member that contacts the surface of the substrate 302 and determines the distance between the substrate 302 and the second housing 102. In the case of the present embodiment, the second spacer 126 is an annular member provided integrally with the second housing 102, and is disposed inside the second light shielding member 142.

  The shape, structure, and effects of the second spacer 126 are the same as those of the first spacer 116.

  The detection means 103 is a device that detects a first light amount that is the amount of light that passes through the first opening 111 and a second light amount that is the amount of light that passes through the second opening 121.

  In the present embodiment, the detection means 103 includes a first detector 114, a second detector 124, a first amplifier 115, and a second amplifier 125.

  The first detector 114 is a sensor that is disposed in the first opening 111 of the first housing 101 and outputs a signal corresponding to the first light amount. The second detector 124 is a sensor that is disposed in the second opening 121 and outputs a signal corresponding to the second light amount.

  In the present embodiment, the first detector 114 and the second detector 124 are sensors having the same type, the same shape, and the same characteristics. More specifically, the first detector 114 includes a photodiode that detects all the amount of light that passes through the entire area of the first opening 111, and the second detector 124 passes through the entire area of the second opening 121. A photodiode that detects the entire amount of light is provided. The first detector 114 and the second detector 124 may be a photodiode array in which a plurality of photodiodes are arranged on the surface, but the photodiodes that seamlessly cover the first opening 111 and the second opening 121 are used. desirable.

  The first casing 101, the second casing 102, the detection means 103, the first light shielding member 141, and the second light shielding member 142 constitute a total light amount measuring device.

  The first amplifier 115 and the second amplifier 125 are devices that amplify the signals transmitted from the first detector 114 and the second detector 124 to such an extent that the arithmetic means 104 can process them. The first amplifier 115 and the second amplifier 125 are not essential components of the present invention.

  In the case of the present embodiment, the first amplifier 115 (the same applies to the second amplifier 125) includes an amplification unit that amplifies a current signal transmitted from the first detector 114 including a photodiode, and converts the current signal into a voltage signal. A conversion unit for conversion and an AD conversion unit for converting an analog voltage signal into a digital signal are provided.

  Further, the detection unit 103 includes a light amount suppression filter 131 and a visibility correction filter 132.

  The light amount suppression filter 131 is a filter that reduces the first light amount and the second light amount. The light amount suppression filter 131 suppresses the first light amount so that it falls within the capability range of the first detector 114, particularly when the first light amount exceeds the detection capability of the first detector 114. It is a filter that reaches 114. The light amount suppression filter 131 is a filter that suppresses the second light amount at the same ratio that suppresses the first light amount.

  In the case of the present embodiment, the detection means 103 includes two light amount suppression filters 131, and the light amount suppression filters 131 are disposed in the first detector 114 and the second detector 124, respectively. The total light amount measurement system 100 is a system that measures the total light amount of the light source 300 that emits visible light, and the light amount suppression filter 131 has a function of uniformly suppressing the light amount corresponding to a wavelength range of 350 nm to 800 nm. It has. The detection unit 103 includes a plurality of types of light amount suppression filters 131 such as a light amount suppression filter 131 that suppresses the light amount to 90% and a light amount suppression filter 131 that suppresses the light amount to 80%. The light amount suppression filter 131 may be used properly.

  The visibility correction filter 132 is a filter for adjusting the wavelength distribution of the light emitted from the light source 300 to the specific visibility representing the intensity with which the human eye feels the brightness for each wavelength of light as a numerical value. When the visibility correction filter 132 is used, the total light quantity of the light source 300 measured by the total light quantity measurement system 100 strongly correlates with the brightness of the light source 300 felt by humans, and an effective index (total luminous flux) indicating the capability of the light source 300 )

  Note that the light amount suppression filter 131 and the visibility correction filter 132 may be appropriately used as necessary. That is, the visibility correction filter 132 is omitted when it is desired to measure the total amount of light from the light source, and the visibility correction filter is used when it is desired to use the total luminous flux.

  The calculation means 104 is an apparatus that calculates the total light quantity of the light source 300 by substituting the first light quantity and the second light quantity detected by the detection means 103 into a predetermined calculation formula.

  Here, the predetermined calculation formula is D = A + (CA) / t. D is the total light quantity. C is the amount of light acquired from the first detector 114. That is, C is the first light quantity. A is the amount of light acquired from the second detector 124. That is, A is the second light quantity. t is a reflectance correction coefficient. The reflectance correction coefficient is a coefficient specific to the total light quantity measurement system 100 and is determined using a light source whose total light quantity is known.

  In the case of the present embodiment, the arithmetic means 104 is a center that can obtain the total light amount D by substituting the digital signal acquired from the first amplifier 115 and the digital signal acquired from the second amplifier 125 into the above equation. A computer having an external memory such as an arithmetic device or a hard disk.

  The computing means 104 is not limited to a computer, and may be a digital circuit that satisfies the above formula. Alternatively, an analog circuit that acquires an analog signal from the first amplifier 115 or the second amplifier 125 and calculates the analog signal according to the above equation may be used.

  In the case of the present embodiment, the total light quantity measuring system 100 includes a light source arrangement unit 301. The light source arrangement unit 301 arranges the light source 300 in the first space 110 of the first housing 101, presses the first light shielding member 141 against the substrate 302, and places the light source 300 in the second space of the second housing 102. This is an apparatus that can be disposed at 120 and can press the second light shielding member 142 against the substrate 302.

  Further, the total light quantity measurement system 100 includes a support unit 150. The support means 150 is a device that supports the substrate 302 by applying a force against the pressing force applied to the substrate 302 when the first housing 101 and the second housing 102 are pressed against the substrate 302. In the case of the present embodiment, as shown in FIG. 1, the total light quantity measurement system 100 includes two support means 150 arranged so as to correspond to each of the first casing 101 and the second casing 102. ing. The support means 150 includes a contact portion 151 and a pressing means 152.

  The abutting portion 151 is a cylindrical shape that abuts against the back surface of the substrate 302 opposite to the first housing 101 and the second housing 102 so as to surround the first insertion hole 112 and the second insertion hole 122, and has a light shielding property. It is a member. As shown in FIG. 1, the abutting portion 151 abuts against the back surface of the substrate 302 corresponding to the first insertion hole 112 and the second insertion hole 122, so that the light source arrangement unit 301 can be connected to the first casing 101 and the second housing 101. The substrate 302 is supported from the back side against the pressing force applied to the substrate through the housing 102, and even when the substrate 302 has translucency, stray light is transmitted from the back surface of the substrate 302 to the first space 110 and the second space. The entry into the second space 120 is prevented. In the case of the present embodiment, the support means 150 including the contact portion 151 has a bottomed cylindrical shape, and almost completely prevents stray light from entering from a portion surrounded by the contact portion 151. .

  The pressing unit 152 is a device that presses the contact portion 151 against the back side of the substrate 302 so as to resist the pressing force applied to the substrate by the light source arrangement unit 301 via the first casing 101 and the second casing 102. In the case of the present embodiment, the pressing means 152 includes a drive source so that the contact portion 151 can be moved forward and backward with respect to the substrate 302.

  Next, a total light quantity measurement method using the total light quantity measurement system 100 will be described.

  8 and 9 are diagrams schematically showing the total light quantity measurement system in order to show the flow of the total light quantity measurement method.

  In the case of the present embodiment, a bullet-type LED is employed as the light source 300 that is the measurement target of the total light quantity measurement system 100. The LED that is the light source 300 emits light in the hemispherical direction, and the amount of light emitted in the hemispherical direction is the total light amount (see FIG. 10). The total light quantity measurement system 100 is a system that measures the total light quantity of a plurality of light sources 300 one after another. The light source 300 is intermittently transported by a transfer mechanism (not shown), and lights up when positioned below the first casing 101 and below the second casing 102. Note that power is supplied to the light source 300 by, for example, bringing a contact point into contact with a terminal provided on the substrate 302.

  In advance, the reflectance correction coefficient t of the total light quantity measurement system 100 used in the present embodiment is calculated and stored in the calculation means 104. The specific method is as follows. The total light quantity of the same type of LED used this time is measured by a light quantity measurement system using an integrating sphere or a light distribution measurement system. This value is set as D. Next, the first light quantity C is obtained by measuring the total light quantity of the LED in the same state as shown in FIG. Next, the second light quantity A is obtained by measuring the light quantity of the LED in the same state as shown in FIG. By substituting D, A, and C obtained as described above into the formula D = A + (C−A) / t, t is calculated. Then, the calculated t is stored in the computing means 104.

  Next, the total light amount of the light source 300 is measured using the total light amount measurement system 100.

  As shown in FIG. 8, the light source arrangement means 301 inserts the light source 300 into the second insertion hole 122 and arranges it in the second space 120 (second arrangement step). At the same time, the light source arrangement unit 301 inserts the light source 300 into the first insertion hole 112 and arranges it in the first space 110 (first arrangement step).

  In this state, the first spacer 116 is in contact with the surface of the substrate 302, and the distance between the substrate 302 and the first housing 101 is determined. The second spacer 126 is in contact with the surface of the substrate 302, and the distance between the substrate 302 and the second housing 102 is determined. Thereby, the positional relationship between the light source 300 and the first detector 114 and the positional relationship between the light source 300 and the second detector 124 are the same.

  In addition, the substrate 302 is sandwiched between the first light shielding member 141 and the support unit 150, and is sandwiched between the second light shielding member 142 and the support unit 150. Therefore, the light of the light source 300 that is lit inside the first casing 101 or the second casing 102 does not leak to the outside and take stray light, and stray light from the outside is not captured by the first casing 101 or the second casing. No intrusion into 102.

  Next, the first light quantity C of the light source 300 is measured using the first detector 114 (first detection step). At the same time, the second light quantity A of the light source 300 is measured using the second detector 124 (second detection step).

  Here, the first detector 114 detects all of the light emitted from the light source 300 via the light amount suppression filter 131 and the visibility correction filter 132. As shown in FIG. 10A, the light detected by the first detector 114 is reflected once by the direct light (solid arrow in FIG. 10A) directly reaching from the light source 300 and the reflection surface 113. Reflected light (broken arrows in FIG. 10 (a)). Accordingly, the first light amount C detected by the first detector 114 is the sum of direct light and reflected light.

  On the other hand, as shown in FIG. 10B, the light detected by the second detector 124 is only the direct light that reaches directly from the light source 300 (solid arrow in FIG. 10B). That is, of the light emitted from the light source 300, the light reaching the absorption surface portion 123 (broken line in FIG. 10B) is absorbed by the absorption surface portion 123 and does not reach the second detector 124. Accordingly, the second light amount A detected by the second detector 124 is a light amount of direct light only. Actually, the light that reaches the absorption surface portion 123 is scattered and reaches the second detector 124. However, it is considered that the amount of light that reaches by absorption is negligible compared to the amount of direct light. .

  Next, the first light quantity C detected by the first detector 114 is linked to information for identifying the light source 300 via the first amplifier 115 and is stored in the computing means 104.

  In the present embodiment, both the first detector 114 and the second detector 124 use photodiodes having the same specifications, and the detection time of the first light amount C and the second light amount A is about 30 msec. .

  Next, the second light amount A detected by the second detector 124 is acquired by the computing means 104 via the second amplifier 125. The calculation means 104 uses the first light quantity C and the second light quantity A that are stored in association with the information for identifying the light source 300, and the total light quantity D of the light source 300 using t acquired in advance. Is calculated (calculation step). The formula used for calculating the total light quantity D is D = A + (CA) / t.

  Next, as shown in FIG. 9, the first casing 101 and the second casing 102 are separated from the substrate 302 by the light source arrangement means 301 and the support means 150 immerses the contact portion 151, and the light source 300 is moved by the transfer mechanism. Is transferred in one direction (transfer process). Along with this operation, a new light source 300 to be measured is disposed below the first housing 101. Further, in this state, the first light shielding member 141 and the second light shielding member 142 are released from the compressed state and their shapes are restored.

  Next, as in the previous period, the second arrangement step and the first arrangement step are performed, the first detection step and the second detection step are performed, and the total light amount D of the light source 300 is sequentially calculated in the calculation step.

  As described above, by repeating the arrangement process, the detection process, the calculation process, and the movement process, the total light quantity measurement system 100 can measure the individual total light quantities of the light sources 300 that are sequentially transferred one after another. ing.

  If the total light quantity measurement method is performed using the total light quantity measurement system 100 described above, the total light quantity of each of the light sources 300 attached to the plurality of substrates can be efficiently measured in a short time. Moreover, since stray light does not enter the first space 110 or the second space 120, it is possible to obtain an accurate measurement result even when the installation environment is provided in-line on the light source 300 mounting line where the installation environment is bright. Become.

(Embodiment 2)
Next, another total light quantity measurement system 100 according to the present invention will be described.

  FIG. 11 is a diagram schematically showing the total light quantity measurement system.

  As shown in the figure, the total light quantity measurement system 100 is a system for measuring the total light quantity of light emitted from the light source 300, and includes a first casing 101, a second casing 102, a detection means 103, The calculation means 104, the support means 150, and the conversion means 230 are provided.

  In addition, the same code | symbol may be attached | subjected about the component which shows the same effect | action and effect as the component demonstrated in Embodiment 1, and description may be abbreviate | omitted.

  In the present embodiment, the detection means 103 includes only the first detector 114 as a detector, and includes only the first amplifier 115.

  The conversion means 230 is a device that displaceably arranges the first detector 114 as a detector at either the position corresponding to the first opening 111 or the position corresponding to the second opening 121. In the case of the present embodiment, the conversion means 230 is a device that exchanges the positions of the first casing 101 and the second casing 102 with respect to the fixed first detector 114. For example, the conversion unit 230 is a single rail on which the first housing 101 and the second housing 102 are slidably attached. Further, the driving force necessary for the conversion may be applied by a human hand, or a driving source such as a motor may be provided.

  In the case of the present embodiment, the support unit 150 uses the light source 300 as the first case 101 or the second case when the conversion unit 230 changes the positions of the first case 101 and the second case 102. It also functions as an avoidance device that can push the light source 300 closer to the first casing 101 or the second casing 102 when the conversion operation is completed.

  In addition, the total light amount measurement system 100 causes the distance between the first detector 114 and the first casing 101 or the distance between the first detector 114 and the second casing 102 to be relatively close (contact). In addition, a detector moving means 231 that can be separated is provided. This prevents interference with the first detector 114 when the conversion means 230 changes the position of the first casing 101 or the second casing 102, and prevents the light receiving surface of the first detector 114 from being scratched. Can be protected.

  In the present embodiment, the conversion unit 230 moves the first casing 101 and the second casing 102. However, the first casing 101 and the second casing 102 are fixed and the first casing 101 is fixed. The detector 114 may be moved. In this case, the light source 300 also moves between the first housing 101 and the second housing 102 as the first detector 114 moves.

  Next, a total light quantity measurement method using the total light quantity measurement system 100 will be described.

  FIG. 12 is a diagram schematically showing the total light quantity measurement system in order to show the flow of the total light quantity measurement method.

  In the case of the present embodiment, an LED is employed as the light source 300 that is the measurement target of the total light quantity measurement system 100. The total light quantity measurement system 100 is a system that measures the total light quantity of one light source 300 in a batch process.

  First, the light source 300 is placed on the contact portion 151 of the support means 150 while being attached to the substrate 302. In addition, a power source is connected to a terminal provided on the substrate 302 so that the light source 300 can be turned on at an arbitrary timing (not shown).

  In advance, the reflectance correction coefficient t of the total light quantity measurement system 100 used in the present embodiment is calculated and stored in the calculation means 104. The specific method is as described above.

  Next, the total light amount of the light source 300 is measured using the total light amount measurement system 100.

  As shown in FIG. 6A, the support means 150 is raised, the light source 300 is inserted into the first insertion hole 112, and is arranged in the first space 110 (first arrangement step). In this state, the bottom of the first casing 101 is pressed against the support means 150 via the first spacer 116 and the substrate 302. The first light shielding member 141 fills the entire space between the first housing 101 provided by the first spacer 116 and the substrate 302 over the entire circumference of the first insertion hole 112, and is located outside the first housing 101. Some stray light is prevented from entering the inside of the first housing 101. In addition, the support means 150 including the contact portion 151 also prevents stray light from entering.

  Next, the light source 300 in the arrangement state is turned on, and the first light amount C of the light source 300 is measured using the first detector 114 (first detection step).

  Next, the first light quantity C detected by the first detector 114 is stored in the computing means 104 via the first amplifier 115.

  Next, as shown in FIG. 4B, the support means 150 is lowered to change the positions of the first casing 101 and the second casing 102 (a conversion step).

  Next, as shown in FIG. 3C, the support means 150 is raised, the light source 300 is inserted into the second insertion hole 122, and is arranged in the second space 120 (second arrangement step). Further, the bottom of the second housing 102 is pressed against the support means 150 via the second spacer 126 and the substrate 302, and like the first light shielding member 141, the second light shielding member 142 has the first stray light. The entry into the second space 120 is blocked. In this state, the positional relationship between the light source 300 and the first detector 114 is the same as that of the first housing 101 by the second spacer 126 coming into contact with the substrate 302.

  Next, the arranged light source 300 is turned on, and the second light quantity A of the light source 300 is measured using the first detector 114 (second detection step).

  Next, the second light quantity A detected by the first detector 114 is acquired by the computing means 104 via the first amplifier 115. The computing means 104 calculates the total light amount D of the light source 300 using the first light amount C and t and the second light amount A that are acquired and stored in advance (calculation step). The formula used for calculating the total light quantity D is D = A + (CA) / t.

  If the total light quantity measurement system 100 is used and the total light quantity measurement method is carried out, the first light quantity C and the second light quantity A are detected by one first detector 114, and therefore errors due to differences in detectors are taken into account. This eliminates the need to perform measurement, and enables more accurate measurement. In addition, it is possible to accurately measure the total amount of light even with the light source attached to the substrate 302 by the first light shielding member 141 or the second light shielding member 142.

  In addition, this invention is not limited to the said embodiment. For example, another embodiment realized by arbitrarily combining the components described in this specification may be the present invention. In addition, the present invention also includes modifications obtained by making various modifications conceivable by those skilled in the art without departing from the gist of the present invention, that is, the meanings indicated in the claims. included. Further, the terms “identical”, “all”, “absorption”, and the like are used to allow an error that does not depart from the spirit of the present invention.

  The present invention can measure the total light amount of the light source attached to the substrate, and can be used as an apparatus for absolute evaluation of the total light amount of the light source. In particular, in a manufacturing factory that manufactures a mounting substrate by mounting a light source on a substrate, the present invention can be used for performance evaluation of the light source on the mounting substrate in a bright state in the factory.

DESCRIPTION OF SYMBOLS 100 Total light quantity measurement system 101 1st housing | casing 102 2nd housing | casing 103 Detection means 104 Calculation means 110 1st space 111 1st opening 112 1st insertion hole 113 Reflecting surface part 114 1st detector 115 1st amplifier 116 1st spacer 120 2nd space 121 2nd opening 122 2nd insertion hole 123 Absorption surface part 124 2nd detector 125 2nd amplifier 126 2nd spacer 131 Light quantity suppression filter 132 Visibility correction filter 141 1st light shielding member 142 2nd light shielding member 150 Support Means 151 Contact portion 152 Press means 230 Conversion means 231 Detector moving means 300 Light source 301 Light source arrangement means 302 Substrate

Claims (6)

A total light quantity measuring system for measuring the total quantity of light emitted from a light source attached to a substrate,
A first housing having a first space in which a light source can be arranged inward, and having a reflection surface portion for regularly reflecting light emitted from the light source arranged in the first space, directly from the light source A first opening through which the direct light that reaches and the reflected light that reaches after being reflected by the reflecting surface portion passes, and a first insertion hole for arranging a light source in the first space on a surface facing the first opening; A first housing having:
A second housing having a second space in which a light source can be arranged inward, the second opening having the same shape and the same area as the first opening, and the light source on the surface facing the second opening. A second insertion hole for disposing in two spaces, and an absorption surface portion that absorbs light so as to allow only direct light radiated from the light source disposed in the second space and directly reaching the second opening to pass through. A second housing
Detecting means for detecting a first light amount that is a light amount of light passing through the first opening and a second light amount that is a light amount of light passing through the second opening;
A calculating means for calculating the total light amount of the light source based on the detected first light amount and the second light amount;
It is arranged so as to surround the entire circumference of the first insertion hole, and fills a gap between the substrate and the first casing when a light source is arranged in the first space, and from the outside of the first casing A flexible first light blocking member that prevents stray light from entering the first space;
It is arranged so as to surround the entire circumference of the second insertion hole, and when the light source is arranged in the second space, it fills the gap between the substrate and the second casing, and from the outside of the second casing A total light quantity measurement system comprising: a flexible second light shielding member that prevents stray light from entering the second space. further,
The total light quantity measuring system according to claim 1, further comprising a support unit that supports the substrate by applying a force against the pressing force applied to the substrate when the first housing and the second housing are pressed against the substrate. The support means is
A cylindrical-shaped abutting portion having a light shielding property that abuts against the back surface of the substrate opposite to the first housing and the second housing so as to surround the first insertion hole and the second insertion hole. 2. The total light quantity measuring system according to 2. further,
A first spacer that contacts the surface of the substrate and determines a distance between the substrate and the first housing;
The total light quantity measurement system according to claim 1, further comprising a second spacer that contacts the surface of the substrate and determines a distance between the substrate and the second housing. A total light quantity measuring device for measuring the total light quantity of light emitted from a light source attached to a substrate,
A first housing having a first space in which a light source can be arranged inward, and having a reflection surface portion for regularly reflecting light emitted from the light source arranged in the first space, directly from the light source A first opening through which the direct light that reaches and the reflected light that reaches after being reflected by the reflecting surface portion passes, and a first insertion hole for arranging a light source in the first space on a surface facing the first opening; A first housing having:
A second housing having a second space in which a light source can be arranged inward, the second opening having the same shape and the same area as the first opening, and the light source on the surface facing the second opening. A second insertion hole for disposing in two spaces, and an absorption surface portion that absorbs light so as to allow only direct light radiated from the light source disposed in the second space and directly reaching the second opening to pass through. A second housing
Detecting means for detecting a first light amount that is a light amount of light passing through the first opening and a second light amount that is a light amount of light passing through the second opening;
It is arranged so as to surround the entire circumference of the first insertion hole, and fills a gap between the substrate and the first casing when a light source is arranged in the first space, and from the outside of the first casing A flexible first light blocking member that prevents stray light from entering the first space;
It is arranged so as to surround the entire circumference of the second insertion hole, and when the light source is arranged in the second space, it fills the gap between the substrate and the second casing, and from the outside of the second casing A total light quantity measuring device comprising: a flexible second light shielding member that prevents stray light from entering the second space. A total light quantity measuring method applied to a total light quantity measuring system for measuring the total quantity of light emitted from a light source attached to a substrate,
The total light quantity measuring system is
A first housing having a first space in which a light source can be arranged inward, and having a reflection surface portion for regularly reflecting light emitted from the light source arranged in the first space, directly from the light source A first opening through which the direct light that reaches and the reflected light that reaches after being reflected by the reflecting surface portion passes, and a first insertion hole for arranging a light source in the first space on a surface facing the first opening; A first housing having:
A second housing having a second space in which a light source can be arranged inward, the second opening having the same shape and the same area as the first opening, and the light source on the surface facing the second opening. A second insertion hole for disposing in two spaces, and an absorption surface portion that absorbs light so as to allow only direct light radiated from the light source disposed in the second space and directly reaching the second opening to pass through. A second housing
Detecting means for detecting a first light amount that is a light amount of light passing through the first opening and a second light amount that is a light amount of light passing through the second opening;
A first arrangement step of arranging a light source in the first space through the first insertion hole;
A first light shielding step of surrounding the entire periphery of the first insertion hole and preventing stray light from entering the first space from the outside of the first housing by the first light shielding member when a light source is disposed in the first space. When,
A first detection step of detecting the first light quantity by the detection means;
A second arrangement step of arranging a light source in the second space through the second insertion hole;
A second light shielding step for enclosing the entire periphery of the second insertion hole and preventing stray light from entering the second space from the outside of the second housing by the second light shielding member when a light source is disposed in the second space. When,
A second detection step of detecting the second light quantity by the detection means;
A total light quantity measuring method including a calculation step of calculating a total light quantity of the light source by a calculation means based on the detected first light quantity and the second light quantity.

Images