JP6445384B2 - Line lighting device and method for manufacturing the same - Google Patents

Description

  The present invention relates to a line illumination device that illuminates a detection position of a sensor such as a line sensor in a line and a method for manufacturing the same.

  This type of line illuminating device is, for example, a line shape in which the detection position of a sensor such as a line sensor camera is matched to the angle of view of the sensor in manufactured product inspection in various manufacturing processes for manufacturing steel plates, sheet glass, food, banknotes, and the like. To illuminate. Further, in order to increase the inspection speed and improve the accuracy, it is necessary to illuminate the detection position of the sensor as brightly and uniformly as possible with a line illumination device (see, for example, Patent Document 1).

  In addition, in order to detect more reliably the surface of a product such as a steel plate, the presence or absence of foreign matter, etc., the line illuminating device so that the optical axis of the line illuminating device and the surface of the product form an angle of about 45 °. Is placed at an angle. By forming an angle between the optical axis of the illumination device and the surface of the product, a shadow is formed on the surface of the product and the back of the foreign matter, thereby improving the detection accuracy of the scratch and the foreign matter (for example, FIG. 21).

  As described above, when the illuminating device is tilted and arranged, a shadow is generated in the scratch K1 (lateral scratch) in FIG. 21 of Patent Document 2, but almost no shadow is generated in the scratch K2 (vertical scratch). For this reason, in order to improve the accuracy of detection of vertical flaws, light from a plurality of LED light sources arranged in the X direction is condensed in the Y direction orthogonal to the X direction using a rod-shaped lens to form a line-shaped light. After that, an attempt is made to tilt the optical axis of the illumination device also in the X direction by entering light from one end side of the bundled optical fibers and emitting light from the other end side of each optical fiber bent in the X direction. (For example, refer to FIG. 13 of Patent Document 2).

JP 2007-225591 A JP 2011-133347 A

  However, the latter illuminating device needs to use a bundled optical fiber in order to tilt the optical axis of the illuminating device in the X direction. Reflection and scattering of light on the light incident surface and light exit surface of the optical fiber, The amount of light at the detection position of the sensor decreases due to light scattering or the like. Furthermore, the finishing accuracy of the end face of each optical fiber and the bending angle on the other end of each optical fiber have a great influence on the amount of light at the detection position of the sensor, the variation in the amount of light, the direction of light irradiation, and the like.

  For this reason, it is necessary to manufacture a bundle of optical fibers with high accuracy and no variation. Moreover, it is necessary to enter the light collected in a line shape by the rod-shaped lens into one end side of the bundled optical fiber without leakage. However, many of these types of lighting devices have large dimensions in the X direction exceeding 50 cm or 1 m, and some of them are several meters. For this reason, it is not easy to manufacture a bundle of optical fibers with high accuracy and uniformity over the entire X direction, and to enter light collected in a line shape into one end side of the bundled optical fibers without leakage. Absent.

  In addition, the surface of the product is observed by the sensor while the product such as a steel plate is moving in the longitudinal direction, but the surface of the product is not completely flat, the product is slightly curved, etc. Thus, the product surface, which is the observation position by the sensor, often moves in the vertical direction. Here, since the line-shaped illumination device is arranged to be inclined in the longitudinal direction of the product as shown in FIG. 21 of Patent Document 2, the illumination position moves in the longitudinal direction of the product due to the change in the vertical position of the product surface. To do.

  Further, as described above, this type of lighting device often has a large dimension in the X direction. For this reason, if an illuminating device is configured to illuminate in a thin line shape, errors are likely to occur in actual inspection, and installation work and maintenance work of the illuminating device and sensor become extremely difficult.

  The present invention has been made in view of such circumstances, and the optical axis can be inclined in the parallel direction (X direction) of the LED light sources without unnecessarily reducing the amount of light. An object of the present invention is to provide a line illumination device and a manufacturing method thereof in which the width of the illumination range can be arbitrarily set.

In order to solve the above problems, the present invention employs the following means.
The linear illumination device according to the first aspect of the present invention is arranged such that a plurality of LED light sources arranged so as to be aligned in the X direction and the optical axes of the respective LED light sources pass through, respectively, in the X direction. A plurality of first condensing lens portions that have a curvature and extend in the Y direction orthogonal to the X direction and condense light from the LED light sources in the X direction, and have a curvature in the Y direction and the X A second condensing lens portion that condenses the light collected in the X direction by each first condensing lens portion in the Y direction, and a direction orthogonal to the X direction and the Y direction. The second condensing element is inclined in the X direction so as to have an angle of 40 ° or more and 80 ° or less with respect to the imaginary line extending in the Z direction, and arranged in the X direction. Refracted light collected in the Y direction by the lens unit in the X direction A plurality of refractive lens surfaces.

  In the first aspect, each of the first condensing lens portions is arranged so that the optical axis of each LED light source passes, so that light from a plurality of LED light sources that emit light radially is directed to a plurality of refractive lens surfaces. You can guide efficiently as you head. Further, light that passes through each first condenser lens portion and is condensed in the X direction and travels radially in the Y direction is condensed in the Y direction by the second condenser lens portion. Then, since the light condensed by the first and second condenser lenses is refracted in the X direction by the plurality of refractive lens surfaces arranged so as to be aligned in the X direction, the lens that causes a decrease in the amount of light. The light axis can be tilted in the direction in which the LED light sources are arranged side by side (X direction) while minimizing the amount of incident light and light emitted from the lens.

  Here, the first and second condenser lens units refract the light emitted radially from the LED light source in the X direction and the Y direction. In addition, even if the light that has passed through the first and second condenser lens portions does not go in the convergence direction so as to be focused, for example, becomes substantially parallel light, or travels while spreading slightly, it travels radially. Is refracted toward the inside (for example, the optical axis side of each LED light source), it is assumed that the light is condensed.

  On the other hand, the light that has passed through each first condenser lens portion is condensed in the X direction, but travels while spreading radially in the Y direction. Therefore, by adjusting the distance between the first condenser lens part and the second condenser lens part, the dimension of the second condenser lens part in the Y direction, and the curvature of the second condenser lens part, The width in the Y direction of the light that has passed through the condenser lens portion, that is, the width of the linear illumination range after passing through the plurality of refractive lens surfaces can be adjusted.

  According to a second aspect of the present invention, there is provided a method of manufacturing a linear illumination device, wherein a plurality of substrate units each mounted with a plurality of LED light sources arranged in the X direction are assembled to the illumination device main body so as to be arranged in the X direction. A first condensing lens for assembling the substrate unit and a plurality of first condensing lens members that condense light from the plurality of LED light sources in the X direction to the illuminating device main body or each of the substrate units. Assembling the members and a second condensing lens member for condensing light from the plurality of first condensing lens members in the X direction and the Y direction orthogonal to the optical axis of the LED light source in the illuminating device main body Assembly of the second condensing lens member disposed in the lens, and assembling the refractive lens member for assembling the refractive lens member for refracting light from the second condensing lens member in the X direction to the illuminating device main body, By doing the line In the assembling step to be an illuminating device and the irradiation position where light is irradiated by the line-shaped illuminating device, a plurality of minute point illuminances or a plurality of minute point illuminances respectively on a plurality of virtual lines that are different in the Y direction and extend in the X direction. A measurement process in which a minute point light quantity is measured by a sensor, and a measurement result in which the computer associates the data of the plurality of minute point illuminances or minute point light quantities measured in the measurement process with measurement positions in the X direction and the Y direction. It includes a measurement result data creation process for creating data, a product delivery process for delivering the line illumination device to a delivery destination, and a data delivery process for delivering the measurement result data to the delivery destination.

  In the second aspect, the light collected by the first and second condenser lens portions is refracted in the X direction by the plurality of refractive lens surfaces arranged so as to be aligned in the X direction, so that the amount of light is reduced. The optical axis can be tilted in the direction in which the LED light sources are arranged side by side (X direction) while minimizing the incident light to the lens and the light exiting from the lens.

On the other hand, the light that has passed through each first condenser lens portion is condensed in the X direction, but travels while spreading radially in the Y direction. Therefore, by adjusting the distance between the first condenser lens part and the second condenser lens part, the dimension of the second condenser lens part in the Y direction, and the curvature of the second condenser lens part, The width in the Y direction of the light that has passed through the condenser lens portion, that is, the width of the linear illumination range after passing through the plurality of refractive lens surfaces can be adjusted.
In addition, since measurement result data is created and delivered together with the lighting device, it is possible to install the line lighting device after knowing the lighting state of the line lighting position at the delivery destination, in order to facilitate the installation. It is advantageous.

  According to the present invention, the optical axis can be tilted in the direction in which the LED light sources are arranged side by side (X direction) without unnecessarily reducing the amount of light, and the width of the linear illumination range can be arbitrarily set. It is.

It is the schematic of the linear illuminating device which concerns on one Embodiment of this invention. It is Y direction sectional drawing of the said linear illuminating device. It is a top view of the board | substrate unit of the said linear illuminating device. It is the IV-IV sectional view taken on the line in FIG. It is a side view of the board | substrate unit of the said linear illuminating device. It is a VI direction arrow directional view of the stopper member in FIG. It is a schematic diagram of an example of an inspection process. It is longitudinal direction sectional drawing of the surface of a steel plate. It is sectional drawing of the width direction of the surface of a steel plate. It is a principal part side view of a refractive lens member. It is a graph which shows the calculation result of the refraction angle to the X direction by a refractive lens member. It is a schematic plan view of an alignment adjustment device. It is a schematic side view of the alignment adjusting device. It is an example of the contour map of the illumination intensity which is measurement result data. It is a side view of the board | substrate unit which shows the modification of this embodiment.

A line illumination device according to an embodiment of the present invention will be described below with reference to the drawings.
This line illumination device illuminates the detection position by an inspection sensor such as a line sensor in a line shape (line shape), and is mounted so that the illumination device main body 10 and a plurality of LEDs 1 are arranged in a straight line. The plurality of board units 20 and the plurality of bolts (fastening means) 30 for fixing each board unit 20 to the heat sink 11 of the illuminating device body 10 so that the plurality of LEDs 1 are arranged in a straight line. In the following description, the parallel direction of the LEDs 1 is the X direction, the direction along the optical axis of each LED 1 is the Z direction, and the X direction and the direction orthogonal to the Z direction are the Y direction.

  The line illumination device is further attached to the illumination device main body 10 so as to extend in the X direction, and a second condenser lens member 40 that condenses the light of the plurality of LEDs 1 arranged in parallel in the Y direction, and a second collector. A refractive lens member 50 that refracts light emitted from the optical lens member 40 in the X direction, and a protective lens member 60 for protecting the refractive lens member 50 are provided. The width of the light at the line-shaped illumination position (condensing position) by this illumination device may be about several mm, may be several tens of mm, and may be several tens of mm in some cases. The case is also line-shaped.

  As shown in FIGS. 1 and 2, the luminaire main body 10 includes a long metal heat sink 11 extending in the X direction, a lower body 12 in which the heat sink 11 is fixed in a hollow portion formed inside, and a lower side. The body 12 includes a pair of side plates 13 in the Y direction in which one end in the Z direction is connected to the body 12, and an upper cover 14 that covers the other end side in the Z direction of each side plate 13. A pair of projections 13a in the Z direction are provided on the opposing surfaces of the pair of side plates 13, and the second condenser lens member 40 is sandwiched by these four projections 13a and positioned in the Y direction and the Z direction. The Each protrusion 13a is provided so as to protrude from the opposing surface of each side plate 13 in the Y direction and to extend in the X direction.

  The second condenser lens member 40 is disposed between the pair of side plates 13, the refractive lens member 50 and the protective lens member 60 are placed on the other side in the Z direction of the pair of side plates 13, and the Z direction of each side plate 13. One end side is engaged with the lower body 12 from the inside, the upper cover 14 is covered on the other end side in the Z direction of the pair of side plates 13, and the lower body 12, the pair of side plates 13, and the upper side are covered with a plurality of bolts 15. The lighting device is made by fixing the cover 14 so as to be integrated, and the second condenser lens member 40, the refractive lens member 50, and the protective lens 60 are positioned and fixed in the lighting device main body 10.

  Each board unit 20 is made of, for example, metal such as copper or aluminum or plastic, and as shown in FIGS. 3 to 6, a board body 21 on which the LED 1, its power supply / control circuit, terminals, and the like are mounted, It has the 1st condensing lens member 22 which light-receives the light from LED1 arranged in parallel on the board | substrate body 21, and the attachment structure 23 which attaches the 1st condensing lens member 22 to the board | substrate body 21. FIG. The substrate body 21 preferably has a dimension in the X direction of 100 mm or less in consideration of ease of manufacture, ease of position adjustment of the line illumination position, ease of maintenance, and the like. The LEDs 1 are preferably high-intensity LEDs 1 and are arranged at a pitch of several mm or less (in this embodiment, 5 mm or less) in order to increase the illuminance at the line-shaped illumination position. Further, the LED 1 is preferably an LED with strong directivity that the light amount outside the range of 35 ° on one side (preferably outside the range of 25 °) from the optical axis is 80% or less of the light amount at the optical axis position. LEDs can also be used. In general, the total amount of light in a range where the amount of light is 100% to 80% with respect to the optical axis position is clearly larger than the total amount of light in other ranges.

  The 1st condensing lens member 22 consists of translucent materials, such as glass and a plastic, and is plate shape. In this embodiment, glass is used in consideration of heat resistance. Each of the first condenser lens members 22 has a curvature in the X direction and extends in substantially the same shape in the cross section in the Y direction, and a plurality of first condenser lens portions 22a arranged in the X direction are arranged in the thickness direction. Provided on one side, a planar light incident surface 22e is provided on the other side in the thickness direction. In this embodiment, the 1st condensing lens part 22a functions as a light emission surface.

  Here, each 1st condensing lens part 22a refracts the direction of the light which radiate | emits radially from each LED1 to a X direction. In addition, even if the light that has passed through the first condenser lens portion 22a does not go in the convergence direction so as to be focused, for example, becomes substantially parallel light or travels slightly spreading, If the light is refracted toward the LED 1 (for example, the optical axis side of each LED 1), the light is condensed in the X direction.

  The attachment structure 23 is made of metal or plastic, and a spacer 23a for holding the first condenser lens member 22 at a predetermined position in the Z direction with respect to each LED 1 of the substrate body 21, and the first condenser lens member on the spacer 23a. The spring member 23b that presses the member 22 in the Z direction and the movement of the first condenser lens member 22 held by the spacer 23a in the Y direction, and a stopper that pushes the first condenser lens member 22 against the spacer 23a Member 23c. The spacer 23a may be a part of the substrate body 21 or a separate member. In the present embodiment, the spacer 23a is a separate member from the substrate body 21, is made of plastic, and is a molded product.

  In the present embodiment, a notch 22 b is provided in the middle portion of the first condenser lens member 22 in the X direction. The notch 22b is formed by notching an intermediate portion in the X direction of the first condenser lens member 22 in the Y direction. If the 1st condensing lens member 22 is hold | maintained at the spacer 23a, the both sides of the X direction of the said notch part 22b each contact | abut to a part of spacer 23a from the X direction outer side. That is, the first condenser lens member 22 includes a first contact portion 22c that contacts the spacer 23a from one side in the X direction and a second contact portion 22d that contacts the spacer 23a from the other side in the X direction. Is provided.

By setting the dimensional tolerance in the X direction of the spacer 23a as small as 3/100 mm or less and the dimensional tolerance in the X direction of the notch 22b as small as 3/100 mm or less, The position of the optical axis of the LED 1 and the X-direction central portion of each first condenser lens portion 22a can be matched or substantially matched, or the position of the optical axis of each LED 1 and each first condenser It is possible to match the position of the lens portion 22a in the X direction. In the state where the X direction aggregated light condensed in the X direction is emitted from each first condenser lens portion 22a, the angle formed by the optical axes of the adjacent X direction aggregated light is 5 ° or less, It is preferably 3 ° or less, more preferably 1 ° or less. That is, even if the angle formed by the optical axis of each X-direction aggregated light with respect to the virtual line extending in the Z-direction is several tens of degrees, the angle formed by the optical axes of the adjacent X-direction aggregated light is equal to or less than the above angle. However, the angle formed by the optical axis of each X-direction aggregated light with respect to the imaginary line extending in the Z direction is preferably close to 0 °. The error in the mounting position of each LED 1 on the substrate body 21 can also be reduced to a few hundredths of mm or less due to recent technological improvements, and the above-described engagement between the spacer 23a and the first condenser lens member 22 is achieved. As such, they can be matched or substantially matched in this way.
On the other hand, the X-direction dimension of the part of the spacer 23a is set to 0.2 mm or more, more preferably 0.5 mm or more smaller than the X-direction dimension of the notch 22b, and the first condenser lens member for each LED 1 is set. It is also possible to make a fine adjustment of the position of 22 in the X direction.

  In this embodiment, the spacer 23 a is fixed to the heat sink 11 together with the substrate body 21 by a plurality of bolts (fixing members) 24. In the present embodiment, the gap between the inner diameter of the bolt hole provided in the spacer 23a and the substrate body 21 and the outer diameter of the bolt 24 is also set to several hundredths of a millimeter, and the spacer 23a is also precisely in the Y direction with respect to the substrate body 21. It is positioned. The spacer 23a and the substrate body 21 can be configured to engage in the X direction, whereby the spacer 23a can be precisely positioned with respect to the substrate body 21 in the X direction.

  As described above, the spring member 23b is fixed to the spacer 23a with the bolt (fixing member) 23d in a state where each first condenser lens member 22 is held by the spacer 23a. When one end in the Y direction of the spring member 23b is fixed to the spacer 23a with the bolt 23d, a part of the first condenser lens member 22 is sandwiched between the other end in the Y direction of the spring member 23b and the spacer 23a. At this time, the spring member 23b is elastically deformed, and a part of the first condenser lens member 22 is pressed against the spacer 23b using the reaction force of the elastic deformation, and is attached to the spacer 23a.

Here, the first condenser lens member 22 and the spacer 23a are not configured to strictly contact with each other in the X direction. As described above, the position of the first condenser lens member 22 in the X direction with respect to each LED 1 is finely adjusted. In the case where the first condensing lens member 22 is pressed against the spacer 23b by the reaction force of the spring member 23b, the position of the first condensing lens member 22 in the X direction is finely adjusted. can do. At this time, since a part of the first condenser lens member 22 is pressed against the spacer 23a by the reaction force of the spring member 23b, the first condenser lens member 22 is useless in the X direction with respect to the spacer 23a and each LED1. The fine adjustment work can be performed without moving, and the work can be easily and accurately performed.
In this case, by turning on the substrate units 20 one by one and confirming the direction and illuminance of the X-direction aggregated light, the fine adjustment and the position of the first condenser lens member 22 of each substrate unit 20 are correct. Can be confirmed. Manufacturing in this way is advantageous in securing unevenness in the amount of light and the amount of light at the line-shaped illumination position, and is also advantageous in smoothly manufacturing a highly accurate product.

  In addition, the stopper member 23c is in contact with one end in the Y direction of the first condenser lens member 22 in the Y direction. On the other hand, the stopper member 23 c is fixed to the heat sink 11 together with the substrate body 21 by a plurality of bolts 24. Accordingly, the stopper member 23c contacts the other end in the Y direction of the first condensing lens member 22 in the Y direction, restricts the movement of the first condensing lens member 22 in the Y direction, and the first condensing lens member 22. Is pressed against the spacer 23a to restrict the movement of the first condenser lens member 22 in the X and Y directions. Here, as described above, a part of the first condensing lens member 22 is pressed against the spacer 23a by the reaction force of the spring member 23b, so that the position of the first condensing lens member 22 is prevented from shifting. The member 23c can be fixed.

Here, a Z-direction abutting portion that abuts the first condenser lens member 22 in the Z direction on one end side in the Y direction of the first condenser lens member 22 on a part of the stopper member 23c, the substrate body 21, and the spacer 23a. It is also possible to provide it.
Furthermore, it is also possible to provide a movement restricting member that presses the first condenser lens member 22 against the Z direction contact portion in the Z direction. The movement restricting member can be configured to press the first condenser lens member 22 in the Z direction against the Z direction abutting portion by a reaction force of a spring member, for example. In this case, the first condensing lens can be obtained by simply abutting the stopper 23c against the first condensing lens member 22 in the Y direction without pressing the first condensing lens member 22 against the spacer 23a with the stopper member 23c. The movement of the member 22 in the X direction can also be restricted.

  Thus, the movement of the first condenser lens member 22 in the X direction and the Y direction is restricted as described above, and the first condenser lens member 22 is positioned and attached by the reaction force of the elastic deformation of the spring member. When this lighting device is used to irradiate light on the surface of a steel sheet of several hundred degrees in a steelworks, it is preferable that the contact portion is not an interference fit setting so that a slight gap is generated at room temperature. As a result, even if the temperature near the substrate unit 20 reaches several hundred degrees, the deformation due to thermal expansion is absorbed by the fact that it is not an interference fit or the elastic deformation of the spring member, and the first condenser lens member 22 is deformed or damaged. Is unlikely to occur. In the present embodiment, since the first condenser lens member 22 is made of glass, thermal deformation of the lens hardly occurs. For this reason, desired accuracy and performance can be maintained for a long time.

  The second condenser lens member 40 is a cylindrical lens having substantially the same length as that of the line illumination device. The diameter is from several tens of millimeters to several tens of millimeters, and is made of transparent plastic such as acrylic resin, glass, or the like. Since the line-shaped illumination device is long and has a length of several meters, and many of the line-shaped illumination devices exceed 3 m, the second condenser lens member 40 also has a length of several meters that is substantially the same as that of the line-shaped illumination device. The second condensing lens member 40 can be formed by connecting a plurality of cylindrical lenses. However, since the connecting portion may be reflected in the condensing position, it is formed from a single cylindrical lens. It is preferable to do.

In this embodiment, since the 2nd condensing lens member 40 consists of a cylindrical lens, the light from each 1st condensing lens part 22a by both the light-incidence surface 40a of the 2nd condensing lens member 40 and the light emission surface 40b. Condenses in the Y direction. That is, the light incident surface 40a and the light exit surface 40b function as a second condenser lens unit.
Here, as shown in FIG. 2, the second condenser lens portions 40 a and 40 b refract the light emitted radially from each LED 1 in the Y direction. Further, even if the light that has passed through the second condenser lens portions 40a and 40b does not go in the convergence direction so as to be focused, for example, becomes substantially parallel light, or travels while spreading slightly, the light traveling radially Is refracted toward the inside (for example, the optical axis side of each LED 1), it is assumed that the light is condensed in the Y direction.

  When the second condensing lens member 40 becomes long as described above, it becomes difficult to uniformly mold the second condensing lens member 40 itself along its length direction. In particular, when the outer diameter of the second condenser lens member 40 is increased, it becomes difficult to uniformly mold the outer diameter of the second condenser lens member 40 along its length direction. If uniform production is required, the production cost of the second condenser lens member 40 will increase significantly. In addition, the position of the second condenser lens member 40 in the Y direction or the Z direction may be slightly shifted when the second condenser lens member 40 is assembled to the illuminating device body 10. Further, since the side plate 13 may be bent by its own weight, the position of the second condensing lens member 40 in the Y direction or the Z direction may be shifted, so it is necessary to pay attention to these points.

  The refractive lens member 50 is a prism lens provided in a length range substantially the same as that of the line illumination device, and is made of transparent plastic such as acrylic resin, glass, or the like. The bent lens member 50 includes a planar light incident surface 50a and a prism surface 50b having a plurality of triangular prism prism lenses arranged in parallel in the X direction. Each prism lens has a refractive lens surface 50c inclined in the X direction so as to have an angle of 30 ° with respect to an imaginary line extending in the Z direction, and a connection surface 50d connecting between adjacent refractive lens surfaces 50c. .

  In the present embodiment, as an example, the connection surface 50d is inclined in the X direction at an angle of 3 ° or less with respect to a virtual line extending in the Z direction. In addition, the pitch P in the X direction of the prism lenses is preferably 1 mm or less, and in this embodiment is 0.5 mm or less. The pitch in the X direction of the prism lenses may be greater than 1 mm, but a smaller one is preferable in terms of increasing the light uniformity at the line-shaped illumination position.

  This line illumination device includes laser light sources as reference light sources on both ends in the X direction. Each laser light source irradiates parallel light having a diameter of several millimeters toward the line-shaped illumination position via the refractive lens member 50 without passing through the first and second condenser lens members 22 and 40. Of the plurality of LEDs 1, specific LEDs 1 at one end and the other end in the X direction can be used as a reference light source. In this case, the light of the specific LED 1 is irradiated to the line-shaped illumination position via the first and second condenser lens members 22 and 40 and the refractive lens member 50.

  In the illuminating device assembled as described above, the light from each LED 1 is condensed in the X direction by the respective first condenser lens portions 22a, and is condensed in the Y direction by the second condenser lens portions 40a and 40b. Thereafter, light enters the refractive lens member 50 from the light incident surface 50a, is refracted in the X direction by each refractive lens surface 50c, passes through the protective lens member 60, and reaches the linear illumination position. The light entering the refractive lens surfaces 50c by the first condenser lens portions 22a and the second condenser lens portions 40a and 40b has a large amount of parallel light components in the Z direction.

  Here, how much light is bent in the X direction by each refractive lens surface 50c will be described with reference to FIGS. In FIG. 10, the inclination angle at which each refractive lens surface 50c is inclined in the X direction with respect to a virtual line extending in the Z direction (the one-dot chain line in FIG. 10, the same applies hereinafter) is indicated by α, and the light passing through each refractive lens 50c The angles inclined in the X direction with respect to the imaginary line extending in the Z direction are indicated by θa, θb, θc, θd, and θe. In FIG. 10, the light L1 from the second condenser lens member 40 is light parallel to the imaginary line, and the light L2 from the second condenser lens member 40 is tilted by 1 ° in the X direction with respect to the imaginary line. The light L3 from the second condenser lens member 40 is inclined by 2 ° in one direction in the X direction with respect to the virtual line, and the light L4 from the second condenser lens member 40 is 1 in the other direction in the X direction with respect to the virtual line. The light L5 from the second condenser lens member 40 is inclined 2 ° to the other side in the X direction with respect to the virtual line.

  In FIG. 10, L1 is a path of light emitted from a certain LED 1 in a direction forming an angle of 5 ° with respect to the optical axis, and L2 and L4 are output from the LED 1 in a direction forming an angle of 15 ° with respect to the optical axis. L3 and L5 are paths of light emitted from the LED 1 in a direction that forms an angle of 25 ° with respect to the optical axis. In this way, when all the light from the LED 1 is not completely parallel light (light traveling in parallel) but includes light traveling in several degrees, the time when the light passes through the second condenser lens member 22 Etc., the lights from the adjacent LEDs 1 are mixed with each other, thereby reducing unevenness in the amount of light at the line-shaped illumination position.

  As illustrated in FIG. 11, the traveling direction of the light that has passed through each refractive lens surface 50c varies depending on the refractive index of the material forming the refractive lens member 50, the inclination angle α, the incident direction of light, and the like. Considering strength, durability, price, etc., the material for forming the refractive lens member 50 is often made of light-transmitting plastic, glass, etc., but their refractive index is often around 1.5. . In addition, it is quite difficult to lower the actual refractive index of such a lens product to 1.3, which is practically 1.3 or more. For this reason, if the inclination angle α is 40 ° or more, the refracted light is applied to the line-shaped illumination position, so that this product functions. Further, if the inclination angle α is 80 ° or less, the light passing through each refractive lens member 50c is surely inclined in the X direction with respect to the imaginary line, which is effective for the inspection of vertical flaws.

As illustrated in FIG. 10, when all of the light incident on each refractive lens surface 50 c is not completely parallel light (light that travels in parallel), but includes light that travels several degrees differently, The light that has passed through each refracting lens surface 50c does not become completely parallel light, but includes light that travels in different directions. This is advantageous in reducing unevenness in the amount of light at the line-shaped illumination position. .
In order to further reduce the unevenness in the amount of light at the line-shaped illumination position, the inclination angle α of each refractive lens surface 50c is changed to the inclination angle α of the adjacent refractive lens surface 50c or the adjacent refractive lens surface 50c (several apart). It is also possible to make it different from that several times.

  After being assembled as described above to become an illumination device, the linear illumination device is supported by the support portion 110 of the alignment adjustment device as shown in FIGS. The alignment adjustment device includes a support portion 110 and an illuminance measurement device described later. In the present embodiment, the line-shaped lighting device is attached to the support portion 110 using a mating mounting portion such as a screw hole of the lighting device main body 10 that is actually used, but without using the mating mounting portion. The line-shaped illumination device may be attached to the support 110 by pressing it with a dedicated jig. As shown in FIG. 13, the support portion 110 is supported by the base 112 so that the tilt mounting hole 111 of the support portion 110 can tilt. For this reason, the support angle of the support part 110 is changed to the axis extending in the X direction (the axis passing through the center of the tilt mounting hole 111), and thereby the support angle of the linear illumination device supported by the support part 110 is changed to X. It can be arbitrarily set around an axis extending in the direction. In the present embodiment, as an example, the support angle is set to an actual installation angle at the delivery destination. In this state, each LED 1 and each laser light source are turned on, and the illuminance measurement is performed by the illuminance measuring device.

  As shown in FIGS. 12 and 13, the illuminance measuring apparatus is mounted on the rail 121 by a sensor 121 in the X direction position moving means (not shown) having a rail 121 extending in the X direction along the support portion 110 and a motor such as a stepping motor. A sensor holder 122 that moves the sensor holder, a minute point illuminance sensor 123 held by the sensor holder 122, a processing device 124 connected to the sensor holder 122 and the minute point illuminance sensor 123, and a display device 125 connected to the processing device 124. And a printer 126 connected to the processing device 124. The processing device 124 is a computer having a CPU, a memory, and the like, and stores a measurement program for operating the processing device 124 so as to perform illuminance measurement and measurement result data creation. The rail 121 is supported by the support part 110 via the frame 121a, and is provided so as to extend in parallel with the line illumination device supported by the support part 110. That is, when the arrangement angle of the support part 110 is changed as described above, the position of the rail 121 also changes. Further, the illuminance measuring apparatus has a driving means such as a stepping motor (not shown) that moves the rail 121 in the Z direction on the frame 121a, whereby a minute point illuminance sensor 123 and a line illumination device are provided as shown in FIG. The distance in the Z direction can be adjusted. The sensor X direction position moving means operates in response to a command from the processing device 124 based on the measurement program, whereby the minute point illuminance sensor 123 moves on the rail together with the sensor holder 122 based on the program. As shown in FIG. 13, the sensor holder 122 is a sensor Y direction moving means having a motor such as a stepping motor that moves the position of the minute point illuminance sensor 123 in the Y direction in response to a command from the processing device 124 based on the measurement program. 122a.

  The minute point illuminance sensor 123 includes a shielding plate 123b having a light guide hole 123a having a diameter of about 1 mm, and light from the line illumination device supported by the support unit 110 through the light guide hole 123a of the shielding plate 123b. And an illuminance sensor 123d for receiving light. That is, the minute point illuminance sensor 123 measures the illuminance of light passing through the light guide hole 123a having a diameter of about 1 mm. In the present embodiment, the minute spot illuminance is measured using the light guide hole 123a having a diameter of about 1 mm. The diameter of the light guide hole 123a is the Y-direction dimension of the second condenser lens member 40 (in the case of the present embodiment, the diameter). If it is 1/10 or less of), minute point illuminance can be measured. However, since the smaller the light guide hole 123a, the more accurate measurement can be performed, the numerical value is preferably 1/15 or less, and more preferably 1/20 or less.

  In the present embodiment, the central axis of the light guide hole 123a is inclined 33 ° in the X direction. In other words, the direction in which the central axis of the light guide hole 123a extends is an angle at which light that has passed through each refractive lens surface 50c of the refractive lens member 50 described later is inclined in the X direction with respect to a virtual axis extending in the Z-axis direction. The central axis of the light guide hole 123a is inclined in the X direction. In addition, it is also possible to make this angle different in the range of 10 degrees or less or 20 degrees or less with respect to the angle aimed at in the design. As a result, the inner wall of the light guide hole 123a extends along the average refraction direction of the light by the refractive lens member 50, and the illuminance sensor 123d mainly travels along the average refraction direction. The point illuminance or the minute point light quantity is measured. Here, the thickness of the shielding plate 123b is not less than the diameter of the light guide hole 123a, preferably not less than 1.5 times. On the other hand, even when the light guide hole 123a whose central axis is not inclined at all in the X direction is used, it is possible to confirm the light quantity and the light quantity unevenness at the line-shaped illumination position.

When the line illumination device is supported by the support unit 110 to perform illuminance measurement and the processing device 124 receives an instruction to start measurement, illuminance measurement is started by the measurement program. At this time, the processing device 124 also accepts the manufacturing serial number of the line illumination device to be measured. In the following, the sensor holder 122, the minute point illuminance sensor 123, the display device 125, and the printer 126 operate according to instructions from the processing device 124 based on the measurement program.
First, the minute point illuminance is measured at a plurality of positions on the first imaginary line extending in the X direction at the line illumination position of the line illumination device supported by the support unit 110. Therefore, the sensor holder 122 moves the sensor holder 122 in the X direction while holding the minute point illuminance sensor 123 at a predetermined position (Y1) in the Y direction, and the minute point illuminance sensor 123 moves several mm in the X direction. Measure minute point illuminance every time. This measurement is performed up to the range of the irradiation position by each laser light source in the X direction.
Subsequently, a minute point at a plurality of positions on a second imaginary line (position Y2) that extends in parallel with the first imaginary line and is separated from the first imaginary line by a predetermined distance (for example, 1 mm) in the Y direction. Measure the illuminance. For this purpose, the sensor Y direction moving means 122a moves the minute point illuminance sensor 123 in the Y direction by the predetermined distance (1 mm), and measures the minute point illuminance every time the minute point illuminance sensor 123 moves several mm in the X direction. .
In this way, after measuring on the first imaginary line, the n-1 imaginary line extends in parallel with the n-1 (n is an integer of 2 or more) imaginary line while increasing n by 1. On the other hand, the minute point illuminance is measured at a plurality of positions on the nth imaginary line separated by a predetermined distance in the Y direction. In the present embodiment, the above measurement is performed until n reaches 9 (at positions Y1 to Y9). In this embodiment, measurement is performed until n reaches 9, but n may be 2 or more. Further, if measurement is performed until n reaches several tens to 100, more accurate measurement can be performed.

  When the above measurement is completed, the processing device 124 creates the measurement result data by associating the measured data of a plurality of minute point illuminances with the measurement positions in the X direction and the Y direction in association with the manufacturing serial number. And displayed on the display device 125. For example, as shown in FIG. 14, a contour map (map data) of illuminance with the horizontal axis corresponding to the X direction and the vertical axis corresponding to the Y direction is created as the measurement result data. In the contour map of the illuminance, the irradiation position 2a by the reference light source is shown. Here, when the wavelength of the light of the reference light source is special with respect to the LED 1, the processing device 124 obtains the irradiation position by the reference light source based on the wavelength, and shows the illuminance contour map. On the other hand, when a specific LED is used as the reference light source, the above measurement is performed after the reference light source is turned on separately from the other LEDs 1, and the irradiation position by the reference light source based on the measurement result (illuminance data of the measured laser light itself) However, it is also possible to show 2a in the contour map of illuminance. In this embodiment, a contour map of illuminance is used. However, a three-dimensional graph (graph data) in which the X axis corresponds to the X direction, the Y axis corresponds to the Y direction, and the Z axis corresponds to the illuminance. It is also possible to create the measurement result data with other graphs.

  Referring to the contour map of the above illuminance, if the illuminance range (for example, the darkest range in FIG. 14) is meandering in the X direction and is meandering in the Y direction, the X direction The meandering can be corrected by performing a process of correcting the position of at least one board unit 20 corresponding to the position, a process of replacing the board unit 20 with a new board unit 20, and the like. After these adjustments are completed, the measurement and the contour map of the illuminance can be created and displayed again.

As a result of the above measurement, if the deviation (meandering) in the Y direction within the range where the illuminance is not less than the predetermined value is within the reference range, the printer 126 prints the contour map of the illuminance in response to a command from the processing device 124, and the operator After removing the illuminating device from the support 110 and performing other predetermined inspections, it is packed in a predetermined packing container. You may perform the process for setting it as a finished product after removing.
The printed serial number is also written on the printed matter. If the deviation (meandering) in the Y direction within the range where the illuminance is not less than a predetermined value is within the reference range with reference to the first contour map of the illuminance, the processing is performed without adjusting the position of the substrate unit 20 or the like. The device 124 prints the contour map of the illuminance by the printer 126, and the operator removes the line illumination device from the support unit 110, performs other predetermined inspections and processes for making a finished product, and then performs predetermined packaging. Pack in a container. Then, the packed line illumination device is sent to the delivery destination together with the printed contour map of illuminance. It is also possible to send a contour map of illuminance to the customer as electronic data. The measurement result data sent to the customer may be the above graph, not the contour map of the illuminance, or the numerical data in which the measured minute point illuminance measurement values correspond to the measurement positions in the X direction and the Y direction. good.

  Here, after the above adjustment is completed, when the deviation in the Y direction in the range where the illuminance exceeds the predetermined value cannot be completely corrected, or the range where the illuminance exceeds the predetermined value is straight, the entire direction is in the Y direction. In the case of deviation, the irradiation direction of the reference light source can be adjusted in the Y direction. For example, in FIG. 14, the irradiation position 2a of the two reference light sources appears in the vicinity of Y5, but the irradiation direction of each reference light source is adjusted in the Y direction so that each irradiation position 2a appears at the position of Y4 or the like. Also good.

  Note that the above measurement, creation of measurement result data, adjustment of the position of the substrate unit 20 in the Y direction, etc., if necessary, remeasurement after adjustment, and recreation of measurement result data are performed in the longitudinal direction of the lighting device. If the dimensions are large, or if the length and diameter of the second condenser lens member 40 are large, the product cannot be made highly accurate unless it is performed on the total number of products to be manufactured. Although it depends on the specifications required at the delivery destination, in general, it is preferable that the second condensing lens member 40 is performed on the total number of products when the length of the second condenser lens member 40 is 1000 mm or longer, and on the total number of products when the length is 800 mm or longer. More preferably. Moreover, it is preferable to carry out with respect to all products when the diameter of the 2nd condensing lens member 40 is 40 mm or more, and it is more preferable to carry out with respect to all products when it is 30 mm or more. In addition, when the accuracy is particularly required at the delivery destination, it is preferable to perform the above for the total number of products to be manufactured even when the length or the diameter is equal to or smaller than the above.

  In the above description, the measurement was performed with the second condenser lens member 40 and the refractive lens member 50 attached. However, the same measurement as described above was performed without the second condenser lens member 40 and the refractive lens member 50 attached. Measurements can also be made. In this case, it is preferable to use a shielding plate 123b in which the central axis of the light guide hole is not inclined at all in the X direction. When this measurement is performed, the substrate unit 20 to be corrected or replaced can be found on the measurement data such as the contour map of the illuminance before the second condenser lens member 40 and the refractive lens member 50 are attached. Can be improved.

  In the present embodiment, a plurality of minute point illuminances are measured on a plurality of virtual lines shifted in the Y direction instead of one virtual line, and the measurement data is made to correspond to the measurement positions in the X direction and the Y direction. Since the measurement result data is created, it is possible to reliably determine the position or line where the illuminance is highest at the line-shaped condensing position. Further, since the position of the substrate unit 20 or the like in the Y direction is adjusted based on the measurement result data, for example, the second condenser lens member 40 is slightly bent due to the weight of the second condenser lens member 40 or the illumination device body 10. Even in this case, it is possible to ensure the accuracy of the line-shaped irradiation position by adjustment. In addition, by measuring all products as described above, the installation can be performed without questioning the accuracy of the irradiation position of the line illumination device at the delivery site, and installation and adjustment at the delivery site is easy. Can be done.

  In addition, since the measurement result data is delivered to the customer who delivered the product of the line lighting device, even if the delivered line lighting device has a slight bend within the allowable range at the irradiation position, the customer Then, it is possible to perform the installation work of the line-shaped illumination device while taking the characteristics into consideration. For this reason, compared with the case where installation work is performed without noticing that there is a characteristic such as slight bending, the work efficiency is greatly improved.

In addition, measurement and creation of measurement result data is performed with the line lighting device installed at the installation angle at the delivery destination, so that the slight deflection of the condenser lens and lighting device body in the installation state at the delivery location is also taken into account. The measurement result data is extremely useful for facilitating installation work at the delivery destination.
Also, when installing the line lighting device at the delivery destination, for example, temporarily fix the line sensor camera based on the irradiation position of the reference light source, and refer to the map data or graph data showing the irradiation position of the reference light source. However, the position of the line illumination device or the line sensor camera can be finely adjusted. That is, since the installation work can be performed with the irradiation position of the reference light source as a mark, the work efficiency is further improved.
Further, when the light from the reference light source is irradiated to the line-shaped illumination position without going through the second condenser lens member 40, the light is not disturbed by a slight swell of the second condenser lens member 40, and the installation work It can be more reliable as a mark when performing.

  In addition, the reference light source can be attached to other places such as the heat sink 11 of the lighting device body 10 and can be mounted on the board unit 20. In these cases, the same effect as described above can be obtained. It is possible. Moreover, it is also possible to provide a highly directional LED light source or other known light source instead of the laser light source as the reference light source. Further, a reference light source as a reference light source can be provided not only at both ends in the X direction of the line illumination device but also near the center.

  In the line-shaped illumination device configured as described above, each first condenser lens portion 22a is arranged so that the optical axis of each LED 1 passes therethrough, and thus a plurality of lights from a plurality of LEDs 1 that emit light radially. Can be efficiently guided toward the refractive lens surface 50c. Further, the light that passes through each first condenser lens portion 22a and is condensed in the X direction and travels radially in the Y direction is condensed in the Y direction by the second condenser lens portions 40a and 40b. Since the light condensed by the first and second condenser lens portions is refracted in the X direction by the plurality of refractive lens surfaces 50c arranged so as to be aligned in the X direction, a lens that causes a reduction in the amount of light The optical axis can be tilted in the direction in which the LEDs 1 are arranged side by side (X direction) while minimizing light entering the lens and light exiting from the lens. For this reason, it is possible to reliably detect not only the lateral wound K1 shown in FIGS. For example, in FIGS. 8 and 9, a shadow is generated in a thick broken line range.

  On the other hand, the light that has passed through each first condenser lens portion 22a is condensed in the X direction but travels while spreading radially in the Y direction. Therefore, the distance between the first condenser lens portion 22a and the second condenser lens portion 40a, the dimension in the Y direction of the second condenser lens portion 40a, and the curvature of the second condenser lens portions 40a and 40b are adjusted. By doing so, it is possible to adjust the width of the light passing through the second condenser lens portion in the Y direction, that is, the width of the linear illumination range after passing through the plurality of refractive lens surfaces. For this reason, the optical axis can be tilted in the juxtaposed direction (X direction) of the LEDs 1 without unnecessarily reducing the amount of light, and the width of the linear illumination range can be arbitrarily set.

  Each first condenser lens member 22 has a plurality of first condenser lens portions 22a. For this reason, rather than positioning each 1st condensing lens part 22a with respect to each LED1, positioning with respect to each LED1 of each 1st condensing lens part 22a can be performed easily. A first condenser lens member 22 is attached to the substrate unit 20. For this reason, when the board | substrate unit 20 is created, each LED1 and each 1st condensing lens part 22a can be aligned. Accordingly, adjustment work when desired characteristics cannot be obtained and replacement work during maintenance can be easily performed.

  In the present embodiment, each first condenser lens portion 22a of the first condenser lens member 22 is a convex lens toward the irradiation position, but may be a concave lens toward the irradiation position. Moreover, it is also possible to provide a 1st condensing lens part so that it may respond | correspond to each LED1 instead of a light-emitting surface side, and making it the convex lens toward each LED1 also makes it a concave lens. It is also possible. Furthermore, it is also possible to provide a first condenser lens portion so as to correspond to each LED 1 on both the light incident surface side and the light exit surface side. In the present embodiment, the light incident surface 22e is a flat surface, and the light incident surface 22e is in contact with the spacer 23a, so that the positional accuracy in the Z direction of each first condenser lens portion 22a can be improved with respect to each LED1. it can.

  Moreover, in this embodiment, the 2nd condensing lens part is comprised by the 2nd condensing lens member 40 which is a cylindrical lens. On the other hand, it is also possible to use a cylindrical lens that condenses light in the Y direction, such as a semicircular cross section or a saddle shape, and allows the curved surface of this lens to function as the second condensing lens portion. It is also possible to use two or more cylindrical lenses as described above and to make the curved surface of these lenses function as the second condenser lens portion. In addition, a linear Fresnel lens that collects light in the Y direction can be used instead of the cylindrical lens.

  In the present embodiment, one first condenser lens member 22 is attached to each substrate unit 20, but it is also possible to attach two or more first condenser lens members to each substrate unit 20. . Further, it is also possible to use a cylindrical lens 25 as the first condenser lens member as shown in FIG. In this case, each cylindrical lens 25 is positioned so as to correspond to each LED 1. Even in this case, each cylindrical lens 25 can be attached to the substrate unit 20 using the reaction force of the spring member. Furthermore, it is also possible to fix the first condenser lens member 22 and the plurality of cylindrical lenses 25 as the first condenser lens member to the lighting device main body 10 side.

In the present embodiment, each refractive lens surface 50c is planar. However, even if it has a slight curvature, the above-described effects can be obtained.
Further, although the shielding plate 123b is used in the measurement, the shielding plate 123b may not be used as long as the illuminance sensor 123d itself can measure the minute point illuminance and the light amount. In this case, when a line sensor having a plurality of pixels (illuminance sensors) arranged in the Y direction is used as a minute point illuminance sensor, a plurality of minute point illuminances are respectively obtained on a plurality of virtual lines only by scanning in the X direction once. It is possible to measure the light intensity of minute points.

  In the present embodiment, the spring member 23b is fixed to the spacer 23a of the substrate unit 20. However, the spring member 23b may be fixed to a portion other than the spacer 23a of the substrate unit 20 and fixed to the lighting device body 10. It is also possible to do. Even in these cases, the first condenser lens member 22 can be attached to the substrate unit 20 by using the reaction force of the elastic deformation of the spring member.

In addition, a line sensor camera is provided instead of the rail 121, the sensor holder 122, and the minute point illuminance sensor 123, and first, the illuminance and luminance at the condensing position are measured on the first virtual line, and then the nth virtual It is also possible to measure the illuminance and brightness at the condensing position on the line and create measurement result data based on the measurement result. When the line sensor camera is used, a problem of bending of the line sensor camera itself occurs. Therefore, the measurement using the rail 121, the sensor holder 122, and the minute point illuminance sensor 123 is more accurate and inexpensive.
Further, instead of the illuminance sensor 124d, another sensor that measures the amount of light (amount of light such as luminous intensity, luminous flux, and luminance) may be used.

  Measurement of minute spot illuminance at a plurality of positions on a plurality of virtual lines performed in the embodiment, creation of measurement result data, position adjustment of the substrate unit 20 and the like based on the measurement result data, remeasurement, and measurement result data of the remeasurement data This may be made at the delivery destination. In this case, the alignment adjustment device is brought to the delivery destination and the final process of manufacturing the product is performed. By performing the above measurement, creation of measurement result data, position adjustment of the substrate unit 20 and the like based on the measurement result data, remeasurement, and creation of measurement result data of the remeasurement data, the second condensing lens member 40 is conveyed during transport. Since the possibility of changing the alignment of each substrate unit 20 can be eliminated, a more accurate line illumination device can be manufactured and delivered.

  In addition, when performing the said measurement in a delivery destination, the attachment part which actually attaches a linear illuminating device in a delivery destination can be used as a support part of this invention. In this case, the product can be delivered to the delivery destination while being supported by the support unit. Thereby, the measurement, creation of measurement result data, position adjustment of the substrate unit 20 and the like based on the measurement result data, remeasurement, and creation of measurement result data of the remeasurement data can be performed in a state close to actual use conditions. Therefore, it is possible to manufacture and deliver a line illuminating device that more closely matches the actual machine.

That is, when combined with the above embodiment, delivery means a state in which the lighting device main body is removed from the support portion, or the line-like lighting device is removed and the predetermined process is performed while being supported by the support portion. This means that the product is delivered to the customer as a finished product, and shipping is also included in the delivery.
Note that the dimensions and specifications of the line illumination device change according to the inspection object and the demands of the customers, and it is rare that the same product is stored in a plurality of customers. In such products, it is often preferable to perform the final manufacturing process at the delivery destination as described above.

  In addition, when the position of the line illumination device and the line sensor camera is readjusted at the delivery destination, the line illumination device or the line sensor camera is referred to with reference to map data or graph data indicating the irradiation position of the reference light source. By finely adjusting the position, readjustment can be performed easily and reliably.

  In addition, while referring to the measurement result data delivered as described above, the delivery destination adjusts the position of the inspection sensor such as a line sensor camera and the delivered line illumination device, and is adjusted in this way. In this state, it is possible to perform inspection using the inspection sensor. Since the position of the inspection sensor and the line illumination device can be adjusted based on the measurement result data, the inspection sensor can surely aim at a line with high illuminance at the line illumination position, and improve the inspection accuracy. it can.

  In the present embodiment, the light collected in the X direction and the Y direction enters the refractive lens member 50 from the light incident surface 50a of the refractive lens member 50. On the other hand, it is also possible to attach the refractive lens member 50 to the illuminating device main body 10 so that the prism surface 50b is not the light incident surface 50a but the LED 1 side is desired. In this case, the light condensed in the X direction and the Y direction enters the refractive lens member 50 via each refractive lens surface 50c, and the light exits from the refractive lens member 50 via the light incident surface 50a. .

  DESCRIPTION OF SYMBOLS 1 ... LED, 2a ... Irradiation position, 10 ... Illuminating device main body, 11 ... Heat sink, 12 ... Lower body, 13 ... Side plate, 14 ... Upper cover, 20 ... Substrate unit, 21 ... Substrate main body, 22 ... First collection Optical lens member, 22a ... first condenser lens portion, 22b ... notch portion, 22c ... first contact portion, 22d ... second contact portion, 23 ... mounting structure, 23a ... spacer, 23b ... spring member , 23c ... stopper member, 30 ... bolt, 40 ... second condenser lens member, 40a, 40b ... second condenser lens portion, 50 ... refractive lens member, 50c ... refractive lens surface, 60 ... protective lens member, 110 ... Support part 111 ... Tilt mounting hole, 112 ... Base, 121 ... Rail, 122 ... Sensor holder, 123 ... Minute point illuminance sensor, 124 ... Processing device, 125 ... Display device, 126 ... Printer

Claims (6)

A plurality of LED light sources arranged to line up in the X direction;
Each of the LED light sources is arranged so that the optical axis passes through, has a curvature in the X direction and extends in the Y direction perpendicular to the X direction, and condenses the light from each LED light source in the X direction. A plurality of first condenser lens portions;
A second condensing lens portion that has a curvature in the Y direction and extends in the X direction, and condenses the light collected in the X direction by the first condensing lens portions in the Y direction;
When the direction perpendicular to the X direction and the Y direction is defined as the Z direction, each of the X direction and the virtual line extending in the Z direction is inclined in the X direction so as to have an angle of 40 ° or more and 80 ° or less. A linear illumination device comprising a plurality of refractive lens surfaces arranged in a direction and refracting light collected in the Y direction by the second condenser lens unit in the X direction. Each of the LED light sources is mounted such that a plurality of LED light sources are arranged in the X direction, and a plurality of substrate units arranged to be arranged in the X direction;
And one or more first lens members attached to each of the substrate units,
The line illumination device according to claim 1, wherein at least a part of the first lens member functions as the first condenser lens unit.   3. The line illumination device according to claim 2, wherein each first lens member is attached to the corresponding substrate unit using a reaction force of a spring member.   The line illumination device according to claim 2, wherein each first lens member has a plurality of first condenser lens portions. Assembling a substrate unit that is mounted on the illuminating device main body so that a plurality of substrate units, each mounted with a plurality of LED light sources arranged in the X direction, are arranged in the X direction, and the light from the plurality of LED light sources is Assembly of a first condenser lens member for assembling a plurality of first condenser lens members that condense in the X direction to the illuminating device body or each of the substrate units, and light from the plurality of first condenser lens members Assembling the second condenser lens member that arranges the second condenser lens member in the X direction and the Y direction perpendicular to the optical axis of the LED light source in the illuminating device main body, and the second condenser An assembly step of making a linear illumination device by assembling a refractive lens member that refracts light from the optical lens member in the X direction to the illumination device body; and
At a line irradiation position where light is irradiated by the line illumination device, a plurality of minute point illuminances or minute point light amounts are measured by sensors on a plurality of virtual lines that are different from each other in the Y direction and extend in the X direction. Measuring process to
A measurement result data creation step in which a computer creates measurement result data in which the data of the plurality of minute point illuminances or minute point light amounts measured in the measurement step are associated with measurement positions in the X direction and the Y direction;
A product delivery process for delivering the line illumination device to a customer;
A method of manufacturing a line illumination device, comprising: a data delivery process for delivering the measurement result data to the delivery destination.   In the measurement step, a minute point illuminance or a minute point light amount of light mainly traveling along the average refraction direction is measured using a shielding wall extending along the average refraction direction of the light by the refractive lens member. The manufacturing method of the line-shaped illuminating device of Claim 5.