JP2005233925A - Optical component and laser line indicator using it - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an optical component that can emit a plurality of rays of light from one illuminant in addition to make easy an optical adjustment, and also provide a laser line indicator using it. <P>SOLUTION: In the optical component 2, since a first optical element 3 consisting of a semi-conical shaped prism longitudinal section of which is the plane perpendicular to the bottom surface, passing through the central axis of cone and a second optical element 4 consisting of a semi-cylindrical shaped prism longitudinal section of which is the plane perpendicular to the bottom surface, passing through the central axis of cylinder have each longitudinal section as a common surface and is formed as a unit so as to conform the central axis of the aforementioned cone of the first optical element 3 and the central axis of the aforementioned cylinder of the second optical element 4, the first optical element 3 emits the incident ray of light 5 from the bottom surface 3a toward the longitudinal section after converting it to the linear reflected ray of light 6 due to reflection at a curved surface 3b, and the second optical element 4 transmits the incident ray of light 5 from the bottom surface 4a to emit outward from the upper surface 4b, while it emits outward the ray of light 5 emitted from the first optical element 3 after transmission from the longitudinal section to the lateral peripheral surface 4c. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a laser line display incorporated in a laser marking device that projects a horizontal reference line, a vertical reference line, and the like, for example, in construction work, electrical work, or sanitary air conditioning work.

  As a laser marking device equipped with such a laser line indicator, a conical recess having an apex angle of 90 degrees is formed on one end surface of a solid columnar body made of a translucent member, and an inner surface of this conical recess is formed. A device using a reflecting mirror formed with a reflecting film is provided (Patent Document 1).

There is also provided an optical system including a half mirror that deflects laser light and a cylindrical lens that uses light deflected by the half mirror as fan-shaped line light in the vertical direction (Patent Document). 2).
JP 2000-18946 JP (Figure 4, Figure 5) JP 2002-98530 JP (FIG. 1)

  In the case of using a laser marking device, there are many requests for simultaneously displaying light indicating vertical points, ground marking points, etc. In the former case, only one line-shaped light can be displayed for one laser light source. Therefore, it is necessary to use a separate light source. On the other hand, in the latter case described above, it is possible to display a plurality of lights from one light source by using two types of optical systems, that is, a half mirror and a cylindrical lens. It takes time and effort. In particular, the laser marking device is required to display the horizontal and vertical angles with high accuracy, and such optical adjustment must be performed with very high accuracy, which requires processing costs and time, and optical adjustment is very difficult. There was a problem that it would be difficult.

  The present invention has been made in view of the above points, and an object of the present invention is to provide an optical element that can irradiate a plurality of lights from a single light source and that can be easily optically adjusted, and a laser line display using the optical element. Is to provide.

  In order to solve the above-mentioned problem, in the invention of claim 1, it has a semi-conical shape with a plane passing through the central axis of the cone and perpendicular to the bottom surface, and the light incident from the bottom surface is directed toward the cut surface. The first optical unit having a reflecting surface reflecting a semi-conical curved surface and a semi-cylindrical shape with a plane passing through the central axis of the cylinder and perpendicular to the bottom surface, and the light incident from the bottom surface is the bottom surface And a second optical unit that transmits light incident from the cut surface to the semicircular cylindrical side peripheral surface, and a cut surface of the first optical unit and the second optical unit. The cutting surfaces of the first optical unit and the second optical unit are made integral with each other so that the cut surfaces of the first optical unit and the cylindrical axis of the second optical unit coincide with each other. The optical element was characterized.

  According to the first aspect of the present invention, when the spot-like light from one light source is incident on the bottom surfaces of the first optical part and the second optical part, the spot-like light is the first light. In the optical part, the light is reflected by the reflecting surface provided in the curved surface part to become line-shaped light, and the second optical part is transmitted as spot-like light from the bottom surface to the surface facing the bottom surface. Thereby, line-shaped light and spot-shaped light having different emission directions can be obtained from light from one light source, and it is not necessary to provide another light source. In addition, since the first optical unit and the second optical unit are integrally formed, the optical adjustment is performed with the shape accuracy of the optical element, unlike an optical system using a combination of a conventional half mirror and a cylindrical lens, for example. be able to. Thereby, the optical adjustment can be performed with high accuracy by forming the shape of the optical element with high accuracy, and the labor of the optical adjustment can be greatly reduced, and the optical adjustment can be easily performed.

  According to a second aspect of the present invention, in addition to the configuration of the first aspect of the invention, the first optical unit cuts light incident on the reflection surface from the direction perpendicular to the bottom surface by the reflection surface. The optical element is characterized in that the angle between the bottom surface and the reflecting surface is equal to or greater than a critical angle so as to totally reflect in the surface direction.

  According to invention of Claim 2, the light which injected into the 1st optical part can be totally reflected. By totally reflecting the light in this way, it is possible to prevent loss of light intensity due to the light being refracted by the reflecting surface and being emitted from the first optical unit to the outside. It becomes possible to clearly display the line-shaped light generated by one optical unit.

  According to a third aspect of the present invention, in addition to the configuration of the first or second aspect of the invention, an optical element characterized in that a reflective film that reflects light outward is formed on a surface portion of the reflective surface; did.

  According to the invention of claim 3, since the reflection film for reflecting light outward is formed on the surface portion of the reflection surface of the first optical unit, the light enters the first optical unit from the bottom surface of the first optical unit. The reflected light can be reflected not only in the direction of the cut surface but also in the outward direction, that is, in the direction opposite to the cut surface, from the upper part of the first optical unit. As a result, it is possible to emit line-shaped light in directions opposite to each other when light is incident on the first optical unit from the bottom surface and when light is incident on the reflective film from above.

  In the invention of claim 4, in addition to the configuration of the invention of any one of claims 1 to 3, a third optical unit is integrally formed on a surface facing the bottom surface of the second optical unit, The third optical unit is configured to reflect or refract light incident from a bottom surface of the second optical unit and emitted from a surface facing the bottom surface; did.

  According to invention of Claim 4, the light radiate | emitted from the surface facing the bottom face of a 2nd optical part can be reflected or refracted by a 3rd optical part. Thereby, for example, light can be narrowed down by using a condensing lens, and the visibility of light can be improved. In addition, since the third optical unit is formed integrally with the second optical unit, optical adjustment between the third optical unit and the second optical unit is not necessary.

  According to a fifth aspect of the invention, in addition to the configuration of the fourth aspect of the invention, the third optical unit receives all light incident from the bottom surface of the second optical unit and emitted from the surface facing the bottom surface. The optical element is characterized by being configured to reflect.

  According to the invention of claim 5, the light emitted from the surface facing the bottom surface of the second optical unit can be totally reflected in an arbitrary direction by the third optical unit.

  According to a sixth aspect of the invention, in addition to the configuration of the fourth or fifth aspect of the invention, a fourth optical unit is provided on the surface from which the light whose optical path has been changed by the third optical unit is emitted from the third optical unit. And the fourth optical unit is configured to reflect or refract light whose optical path has been changed by the third optical unit.

  According to the invention of claim 6, the light whose optical path is changed by the third optical unit can be reflected or refracted by the fourth optical unit. Thereby, for example, light can be narrowed down by using a condensing lens, and the visibility of light can be improved. In addition, since the fourth optical unit is formed integrally with the third optical unit, optical adjustment between the fourth optical unit and the third optical unit is not necessary.

  According to a seventh aspect of the invention, in addition to the configuration of the sixth aspect of the invention, the fourth optical part has a substantially conical recess that expands from the third optical part side to the front outer side. It was set as the optical element characterized by having.

  According to the seventh aspect of the present invention, the light emitted from the third optical unit can be reflected by the inner surface of the substantially conical concave portion of the fourth optical unit to obtain line-shaped light. Since the optical portion can also emit line-shaped light, two types of line-shaped light can be emitted from one optical element.

  According to an eighth aspect of the invention, in addition to the configuration of the seventh aspect of the invention, a first flat surface portion is provided on at least one of the outer surfaces of the upper end portion and the lower end portion of the fourth optical portion, and the first optical portion is provided. An optical element is characterized in that a second flat surface portion is provided on the inner surface of the recess facing the flat surface portion.

  According to the invention of claim 8, when spot-like light is incident on the concave portion of the fourth optical portion from the apex side, the spot-like light is reflected by the inner surface of the concave portion to become line-shaped light. At the same time, the light incident on the second plane portion of the spot-shaped light is reflected by the second plane portion without being converted into line-shaped light, and passes through the fourth optical portion and then the first light. consists of flat surface portion to be emitted as a spot-shaped light. Thereby, the line-shaped light and the spot-shaped light emitted in the upward direction, the downward direction, or both directions can be obtained from one spot-shaped light.

  In the present invention of claim 9, in addition to the configuration of the invention according to claim 7, wherein the second optical unit, the third optical portion, and the fourth optical part, each of the first optical portion Are provided so as to have a common end face, and are integrally extended from the end face to the first optical part side by a predetermined thickness in parallel with the end face, and the first optical part is extended to the second optical part. parts, the third second extending portions in the optical portion of the third extended portion of the provided fourth optical portions, the first extending portion of the cut surface of the first optical unit The light is incident on the bottom of the first optical part and is transmitted to the second extension part, and the second extension part is the first extension part. The light that has entered from is reflected and emitted to the third extending portion, and the third extending portion has a first flat portion on at least one of the outer surfaces of the upper end portion and the lower end portion thereof. Both have a second plane part on the inner surface of the extension part facing the first plane part, and reflect light incident from the second extension part on the second plane part, The optical element emits from the first flat surface portion.

  According to the invention of claim 9, the second optical unit, third optical unit and fourth optical unit, the first extending portion, respectively, the second extending portion, and a third extension of the Since the part is provided integrally, when the spot-like light is incident from the bottom surface of the first optical part, the light incident on the cut surface side portion of the first optical part among the spot-like light is The first extending portion is transmitted to the second extending portion without being reflected by the curved surface portion, and is reflected by the second extending portion without being converted into line-shaped light, thereby being reflected by the third extending portion. It will enter the installation part. Then, the light incident on the third extending portion is reflected by the second plane portion without being converted into line-shaped light, and after passing through the third extending portion, is spotted from the first plane portion. The light is emitted in the form of light. Thereby, the line-shaped light and the spot-shaped light emitted in the upward direction, the downward direction, or both directions can be obtained from one spot-shaped light.

  According to a tenth aspect of the present invention, in addition to the configuration of the ninth aspect of the invention, a curved surface portion of the first optical portion embedded in the first extending portion is partly from the first extending portion. The optical element was characterized by being exposed.

  According to the invention of claim 10, for example, by exposing the curved surface portion of the first optical portion as a shape in which the first extending portion is notched, the spot-like light is incident on the first optical portion from the bottom surface. When this is done, the amount of light reflected in a line shape by the curved surface portion of the first optical portion can be increased.

  In the present invention of claim 11, in addition to the configuration according to claims 8 to 10 any one, the first plane portion parallel to the central axis of the recess, said second flat portion is the fourth An optical element having an angle of 45 degrees with respect to the central axis of the concave portion of the optical part.

  According to the eleventh aspect of the present invention, when spot-like light parallel to the central axis of the concave portion of the fourth optical portion is incident on the second plane portion from the apex side of the concave portion, the spot-like light is second Is reflected in a direction perpendicular to the central axis by the flat surface portion, and is emitted outward from the fourth optical portion 16 without being refracted by the first flat portion. Thereby, spot-like light traveling in a direction perpendicular to the central axis of the concave portion of the fourth optical unit can be obtained.

  According to a twelfth aspect of the present invention, in addition to the configuration according to any one of the first to eleventh aspects, the cutting surface of the first optical unit is a surface that passes through the central axis of the cone and is perpendicular to the bottom surface. The cut surface of the second optical unit is an optical element characterized in that it is a surface passing through the central axis of the cylinder and perpendicular to the bottom surface.

  According to the invention of claim 12, since the first optical part has a semi-conical shape and the second optical part has a semi-cylindrical shape, a spot shape incident from the bottom surface of the first optical part. Can be converted into line-shaped light extending 180 degrees by the curved surface portion of the first optical unit, and emitted from the second optical unit.

  According to a thirteenth aspect of the present invention, at least the optical element according to any one of the first to twelfth aspects, a semiconductor laser generator, and a light projecting lens are provided, and the laser light emitted from the semiconductor laser generator is The laser comprising the optical element, the semiconductor laser generator, and the light projecting lens so as to be incident on the optical element from a direction perpendicular to a bottom surface of the optical element through the light projecting lens. A line indicator was used.

  According to the invention of claim 13, a laser line display using the optical element according to any one of claims 1 to 12 can be obtained. Therefore, a laser generator and an optical system such as a half mirror and a lens are separately required by making the laser light incident on the optical element so as to cover both bottom surfaces of the first optical unit and the second optical unit. Two types of light can be emitted, and the production cost of the laser line indicator becomes low. In addition, since the optical adjustment of the laser beam emission direction and the like can be performed with the accuracy of the shape of the optical element, the optical adjustment can be performed with high accuracy by forming the shape of the optical element with high accuracy, and the effort of optical adjustment is reduced. This can greatly reduce the optical adjustment.

  In the present invention, spot-like light from one light source is incident on both bottom surfaces of the first optical unit and the second optical unit, so that lines having different emission directions from the light from one light source can be obtained. can be obtained Jo light and spot-like light, also, since the first optical portion and a second optical section are formed integrally, it can be performed by the shape accuracy of the optical elements of the optical adjustment Thus, there is an effect that the optical adjustment can be performed with high accuracy by forming the shape of the optical element with high accuracy, and the labor of the optical adjustment can be greatly reduced, and the optical adjustment can be easily performed.

  An embodiment of the present invention will be described with reference to FIGS.

(Embodiment 1)
As shown in FIG. 2A, the optical element 2 used in the laser line display 1 of the present embodiment has, for example, a plane passing through the central axis of a cone having an apex angle of 90 degrees and being perpendicular to the bottom surface as a cut surface. The first optical unit 3 made of a semi-conical prism and the second optical unit 4 made of a semi-cylindrical prism having a cutting surface passing through the central axis of the cylinder and perpendicular to the bottom surface will be described later. Are integrally formed.

  That is, the first optical unit 3 and the second optical unit 4 have their respective cut surfaces as a common surface, and the central axis of the cone of the first optical unit 3 and the cylinder of the second optical unit 4. By matching the central axis of the first optical unit 3, the semicircular bottom surface 3a of the first optical unit 3 and the semicircular bottom surface 4a of the second optical unit 4 are concentric so that the first optical unit 3 The optical element 2 is configured by integrally forming the part 3 and the second optical part 4. In addition, the 1st optical part 3 and the 2nd optical part 4 are formed in the same height dimension, the bottom face 3a of the 1st optical part 3, the bottom face 4a of the 2nd optical part 4, and 1st optics There is no step between the apex of the portion 3 and the top surface 4b, which is the surface facing the bottom surface 4a of the second optical unit 4.

  The optical element 2 is configured as described above, and the behavior when the spot-like light 5 enters the optical element 2 will be described next.

  When spot-like light 5 is incident on the bottom surface 3a of the first optical unit 3 and the bottom surface 4a of the second optical unit 4 constituting the bottom surface of the optical element 2 from the vertical direction with respect to both the bottom surfaces 3a and 4a. As described above, the first optical unit 3 has a semi-conical shape composed of a cone having an apex angle of 90 degrees, and the angle between the curved surface part 3b of the semi-conical shape and the bottom surface 3a is 45 degrees. As shown in FIGS. 2B and 2D, the spot-like light 5 incident on the bottom surface 3 a of the first optical unit 3 from the vertical direction is converted into the bottom surface 3 a by the curved surface portion 3 b of the first optical unit 3. Is reflected in the direction of the cut surface of the first optical unit 3, that is, in the direction of the second optical unit 4, and becomes reflected light 6. Therefore, the curved surface portion 3b functions as a reflecting surface that reflects light. Further, since the reflected light 6 is light reflected by the curved surface portion 3b having a semicircular cross-sectional shape parallel to the bottom surface, the spot-like light 5 is a fan-shaped line as shown in FIG. Light. Further, the reflected light 6 is incident on the second optical unit 4 from its cut surface, and is emitted from the semicircular cylindrical side peripheral surface 4c. Incidentally, since the match the first optical portion 3 to the central axis of the second optical unit 4 as described above, reflected light 6 is perpendicular to the second optical unit 4 of the side circumferential surface 4c Therefore, the light is not refracted by the side peripheral surface 4c. The spot-like light 5 incident on the second optical unit 4 from the direction perpendicular to the bottom surface 4 a passes through the inside of the second optical unit 4 and is transmitted to the upper surface 4 b of the second optical unit 4. Is done.

  Accordingly, when the spot-like light 5 is incident on the optical element 2 from the direction perpendicular to the bottom surface of the optical element 2, the first optical unit 3 causes the spot-like light 5 incident from the bottom surface 3a to be incident on the curved surface part 3b. The reflected light 6 is reflected to be converted into reflected light 6 that is line-shaped light and emitted in the direction of the cut surface. The second optical unit 4 transmits the reflected light 6 emitted from the first optical unit 3 to the side from the cut surface. The light is transmitted to the peripheral surface 4c and emitted to the outside, and the spot-like light 5 incident from the bottom surface 4a is transmitted and emitted to the outside from the upper surface 4b.

  That is, the spot-like light 5 incident on the optical element 2 so as to cover both the bottom surfaces 3a and 4a is converted into reflected light 6 that is a line-shaped light only at the portion incident on the bottom surface 3a. The light is divided into two types of reflected light 6 and spot-like light 5 and is emitted from the optical element 2.

  Further, in the first optical unit 3 described above, the angle between the bottom surface 3a and the curved surface part 3b is set to 45 degrees by forming the apex angle of the semiconical shape at 90 degrees. The angle is not limited to the above, and any angle may be used as long as the spot-like light 5 incident in the direction perpendicular to the bottom surface 3a is totally reflected in the cut surface direction by the reflecting surface which is the curved surface portion 3b. That is, if the angle between the bottom surface 3a and the curved surface portion 3b is equal to or greater than the critical angle, the present invention can be carried out without any problem. As described above, when the angle between the bottom surface 3a and the curved surface portion 3b is equal to or greater than the critical angle, the spot-like light 5 is totally reflected by the curved surface portion 3b. Thus, the light can be prevented from being refracted and emitted from the first optical unit 3 to the outside, and the loss of the intensity of the reflected light 6 can be prevented.

  Next, a laser line display 1 using such an optical element 2 will be described. Laser line display device 1, as shown in FIG. 1, at least, the optical element 2, a semiconductor laser generator 7, provided with a light projecting lens 8 for adjusting the laser beam from the semiconductor laser generator 7 The optical element 2, the semiconductor laser generator 7, and the light projecting lens 8 are arranged so that the emitted laser light enters the optical element 2 from a direction perpendicular to the bottom surface of the optical element 2 through the light projecting lens 8. It is configured.

  In the laser line display 1 configured as described above, when laser light is emitted from the semiconductor laser generator 7, a part of the laser light is converted into a line shape by the optical element 2 as described above. laser light is to be emitted from the laser line indicator 1.

  Such a laser line display 1 is used for, for example, a laser marking device 9. When this laser marking device 9 is installed and operated on the floor surface 10a of the room 10 as shown in FIG. 3, the laser marking device 9 is directed vertically upward from the laser emission point o of the laser marking device 9 toward the ceiling surface 10b. The laser beam is emitted to irradiate the point O ′ of the ceiling surface 10b, and the line-shaped light A spreading in a fan shape horizontally from the laser emission point o to the floor surface 10a is emitted, and the points a, b, Irradiate a line consisting of c and d. That is, by using this laser marking device 9, a vertical point is displayed on the ceiling surface 10b, and a rake line, which is a horizontal line on the floor surface 10a used as a horizontal reference line, is displayed on the wall surface 10c. Can do.

  According to the present embodiment, when the spot-like light 5 from one light source is incident on the bottom surface 3a of the first optical unit 3 and the bottom surface 4a of the second optical unit 4, the spot-like light 5 is incident. Is reflected by the curved surface portion 3b in the first optical unit 3 to become line-shaped reflected light 6, and is transmitted as the spot-shaped light 5 from the bottom surface 4a to the top surface 4b in the second optical unit 4. become. As a result, line-shaped light and spot-shaped light having different emission directions can be obtained from light from one light source, and there is no need to provide a complicated configuration such as a half mirror or a cylindrical lens or another light source. In addition, since the first optical unit 3 and the second optical unit 4 are integrally formed, unlike the conventional optical system using a combination of a half mirror and a cylindrical lens, for example, the optical adjustment is performed according to the shape of the optical element. This can be done with accuracy. Thereby, the optical adjustment can be performed with high accuracy by forming the shape of the optical element with high accuracy, and the labor of the optical adjustment can be greatly reduced, and the optical adjustment can be easily performed.

  Further, in the laser line display 1 using the optical element 2 described above, laser light is incident on the optical element 2 so as to cover both the bottom surfaces 3a and 4a of the first optical unit 3 and the second optical unit 4. Thus, two types of light can be emitted without requiring a separate laser generator and optical system, such as a half mirror or a lens. Accordingly, the production cost of the laser line indicator 1 is low cost.

  In the present embodiment, the optical element 2 includes a first optical portion 3 are constituted by forming a second optical unit 4 together, but the first optical portion 3 and the second optical unit It can also be set as the structure which bonded together after forming 4 in a different body. However, in this case, a step of bonding the first optical unit 3 and the second optical unit 4 is required, and the axial alignment of the first optical unit 3 and the second optical unit 4 is further performed at the time of bonding. Therefore, it is necessary to form the first optical unit 3 and the second optical unit 4 integrally to constitute the optical element 2 because these disadvantages such as the need for complicated optical adjustment such as It is superior in that it eliminates the disadvantages.

(Embodiment 2)
The present embodiment is characterized by the first optical unit 3 of the optical element 2 as compared to the first embodiment described above, and the other configurations are the same as those of the first embodiment described above, and thus description thereof is omitted.

  In the present embodiment, as shown in FIG. 4A, the reflective film 11 that reflects light is formed on the surface portion of the curved surface portion 3 b that is the reflective surface of the first optical unit 3.

  By forming the reflection film 11 in this way, the above-described not only for the light from the bottom surface side of the optical element 2 as in the first embodiment but also for the light from the top surface side of the optical element 2. The same effects as those of the first embodiment can be obtained. The behavior when the spot-like light 12 enters the optical element 2 from the upper surface of the optical element 2 will be described below.

  When the spot-like light 12 in the vertical direction is incident on the bottom surfaces 3a and 4a from the upper surface side of the optical element 2, as described above, the first optical unit 3 is composed of a cone having an apex angle of 90 degrees. Since the angle between the curved surface portion 3b and the bottom surface 3a is 45 degrees, as shown in FIGS. 4B and 4D, the curved surface portion 3b is moved from the direction perpendicular to the bottom surface 3a of the first optical unit 3 as shown in FIGS. The spot-like light 12 incident on the formed reflective film 11 is reflected by the reflective film 11 parallel to the bottom surface 3 a and outward of the first optical unit 3 to become reflected light 13. The reflected light 13 is light reflected by the reflective film 11 formed on the surface portion of the curved surface portion 3b in which the spot-shaped light 12 is parallel to the bottom surface and has a semicircular cross section. the line-shaped light spreading in a fan as shown in FIG. The spot-like light 12 incident on the upper surface 4b from the direction perpendicular to the bottom surface 4a of the second optical unit 4 passes through the inside of the second optical unit 4, and the bottom surface 4a of the second optical unit 4. Permeated through.

  Therefore, when the spot-like light 12 perpendicular to the bottom surface of the optical element 2 is incident on the optical element 2 from the upper surface side of the optical element 2, the first optical unit 3 is spot-like light by the reflective film 11. 12 is reflected to be converted into reflected light 13 that is line-shaped light, and is emitted outward from the first optical unit 3. The second optical unit 4 receives the spot-like light 12 incident from the upper surface 4 b. The light passes through and exits from the bottom surface 4a.

  That is, since the spot-like light 12 is converted into the reflected light 13 that is the line-shaped light only at the part incident on the reflective film 11 of the first optical unit 3, the reflected light 13 that is the line-shaped light and The light is divided into two types, that is, the spot-shaped light 12 and emitted from the optical element 2.

  According to this embodiment, since the reflection film 11 that reflects light outward is formed on the surface portion of the curved surface portion 3b that is a reflection surface that reflects light of the first optical unit 3, the first optical unit 3 In addition to reflecting the light incident on the first optical unit 3 from the bottom surface 3a of the first optical unit 3 in the direction of the cut surface, the light 12 incident on the reflective film 11 from the top of the first optical unit 3 is directed outward, that is, the cut surface Can be reflected in the opposite direction. As a result, when the light is incident on the first optical unit 3 from the bottom surface 3a and when the light is incident on the reflective film 11 from above, the line-shaped light spreading in a fan shape is emitted in opposite directions. Can be made. Further, by providing the reflection curtain 11 so as to cover the curved surface portion 3b of the first optical unit 3, light incident from the bottom surface 3a of the first optical unit 3 is refracted by the curved surface portion 3b and emitted to the outside. Can be prevented.

(Embodiment 3)
The present embodiment is characterized by the optical element 2 as compared with the first embodiment described above, and the other configurations are the same as those of the first embodiment described above, and thus the description thereof is omitted.

  The optical element 2 used in the laser line indicator 1 of this embodiment, as shown in FIG. 5, the first optical portion 3 and the second optical unit 4 described above, as a new third optical portion 14 The condenser lens is integrally formed.

  That is, the first optical unit 3 and the second optical unit 4 are integrally formed as described above, and light incident on the third optical unit 14 from the bottom surface 4a of the second optical unit 4 is emitted. The light is transmitted to the upper surface 4b from the bottom surface 4a of the second optical unit 4 so as to be incident on the third optical unit 14.

  The optical element 2 is configured as described above, and the behavior when spot light enters the optical element 2 will be described next.

  When spot-like light is incident on the bottom surface 3a of the first optical unit 3 and the bottom surface 4a of the second optical unit 4 constituting the bottom surface of the optical element 2 from the vertical direction with respect to the bottom surfaces 3a and 4a, As in the first embodiment, the first optical unit 3 reflects the spot-like light incident from the bottom surface 3a by the curved surface part 3b, converts it into line-shaped reflected light, and emits it in the direction of the cut surface. The second optical unit 4 transmits the reflected light emitted from the first optical unit 3 from the cut surface to the side peripheral surface 4c to be emitted to the outside, and the spot-like light incident from the bottom surface 4a. And is emitted from the upper surface 4b to the outside. In addition to this, in the present embodiment, since the condenser lens is integrally formed on the upper surface 4b of the second optical unit 4 as the third optical unit 14, the light is emitted from the upper surface 4b of the second optical unit 4. The light enters the third optical unit 14, is refracted by the convex surface 14 a of the condensing lens that is the third optical unit 14, and is emitted to the outside.

  That is, the spot-shaped light incident on the optical element 2 so as to cover both the bottom surfaces 3a and 4a is divided into two types of line-shaped light and condensed spot-shaped light. It will be emitted.

  According to the present embodiment, in addition to the effects of the first embodiment described above, the light emitted from the upper surface 4b of the second optical unit 4 is condensed by the condensing lens used as the third optical unit 14. Can be made. Thereby, the visibility of light can be improved. In addition, since the third optical unit 14 is formed integrally with the second optical unit 4, optical adjustment between the third optical unit 14 and the second optical unit 4 becomes unnecessary.

  Further, as shown in FIGS. 6A and 6B, a prism for totally reflecting light can be used as the third optical unit 15. This prism has a triangular prism shape of a right isosceles triangle, and the third optical unit 15 is configured such that light transmitted from the bottom surface 4 a to the top surface 4 b of the second optical unit 4 enters the third optical unit 15. Is formed integrally with the upper surface 4b of the second optical unit 4 with the inclined surface 15a facing upward.

  Next, the behavior when spot-like light enters the optical element 2 will be described.

  When spot-like light is incident on the bottom surface 3a of the first optical unit 3 and the bottom surface 4a of the second optical unit 4 constituting the bottom surface of the optical element 2 from the vertical direction with respect to the bottom surfaces 3a and 4a, As in the first embodiment, the first optical unit 3 reflects the spot-like light incident from the bottom surface 3a by the curved surface part 3b, converts it into line-shaped reflected light, and emits it in the direction of the cut surface. The second optical unit 4 transmits the reflected light emitted from the first optical unit 3 from the cut surface to the side peripheral surface 4c to be emitted to the outside, and the spot-like light incident from the bottom surface 4a. The light is transmitted and emitted from the upper surface 4b to the outside. In addition, since the third optical unit 15 is formed integrally with the upper surface 4b of the second optical unit 4, light emitted from the upper surface 4b of the second optical unit 4 is transmitted to the third optical unit. 15, is totally reflected in the parallel direction with respect to the bottom surface of the optical element 2 by the inclined surface 15 a, and is emitted to the outside from the emission surface 15 b of the third optical unit 15.

  That is, the spot-shaped light incident on the optical element 2 so as to cover both the bottom surfaces 3a and 4a is divided into two types of line-shaped light and spot-shaped light parallel to the line-shaped light. The light is emitted from the optical element 2.

  Next, the laser marking device 9 provided with the laser line display 1 constructed using this optical element 2 will be described. When this laser marking device 9 is installed and operated on the floor 10a of the room 10 as shown in FIG. 7, the laser marking point 9 from the laser emission point o of the laser marking device 9 toward the wall surface 10c in the horizontal left direction. A laser is emitted to irradiate a point d ′ on the wall surface 10c, and a line-shaped light A extending in a fan shape horizontally is emitted from the laser emission point o to the floor surface 10a, and the points a, b, c, Irradiate the line consisting of d. That is, by using this laser marking device 9, it is possible to display the horizontal point on the wall surface 10c and to display the rake line on the wall surface 10c.

  In this embodiment, a condensing lens and a prism for totally reflecting light are used as the third optical unit. However, the third optical unit is not limited to these optical elements, and any other arbitrary optical unit can be used. it may be reflected or refracted light using the optical element.

(Embodiment 4)
The present embodiment is characterized by the optical element 2 as compared with the first embodiment described above, and the other configurations are the same as those of the first embodiment described above, and thus the description thereof is omitted.

  As shown in FIGS. 8A and 8B, the optical element 2 used in the laser line display 1 of the present embodiment includes the first optical unit 3, the second optical unit 4, and the third optical unit described above. In addition to the optical unit 15, a later-described fourth optical unit 16 is newly formed integrally.

  The fourth optical unit 16 includes a semi-cylindrical prism having a semi-conical concave portion 16a having a cutting surface that is a plane perpendicular to the bottom surface passing through the central axis of a circular cylinder having a conical concave portion having a common central axis. It is.

  That is, in the optical element 2, the first optical unit 3 and the second optical unit 4 are integrally formed as described above, and the third optical unit 15 is formed from the bottom surface 4 a of the second optical unit 4. the incident light to emit from the emission surface 15b in the direction parallel to the total reflection to the bottom surface 4b at the slope 15a, formed integrally with the upper surface 4b of the second optical unit 4. Then, the semi-conical concave portion 16a of the fourth optical unit 16 is expanded from the emission surface 15b of the third optical unit 15 to the front outer side, and is totally reflected by the third optical unit 15. Light is incident on the concave portion 16a from the apex side of the concave portion 16a so as to be integrally formed on the emission surface 15b of the third optical portion 15.

  Next, the behavior when spot-like light is incident on the optical element 2 configured as described above will be described. When spot-like light is incident on the bottom surface 3a of the first optical unit 3 and the bottom surface 4a of the second optical unit 4 constituting the bottom surface of the optical element 2 from the vertical direction with respect to the bottom surfaces 3a and 4a, As in the first embodiment, the first optical unit 3 reflects the spot-like light incident from the bottom surface 3a by the curved surface part 3b, converts it into line-shaped reflected light, and emits it in the direction of the cut surface. The second optical unit 4 transmits the reflected light emitted from the first optical unit 3 from the cut surface to the side peripheral surface 4c to be emitted to the outside, and the spot-like light incident from the bottom surface 4a. The light passes through and exits from the upper surface 4b. Then, the third optical unit 15 totally reflects the light emitted from the upper surface 4b of the second optical unit 4 in the direction parallel to the bottom surface of the optical element 2 as in the above-described third embodiment. The light exits from the exit surface 15b of the optical unit 15 to the outside. And the 4th optical part 16 converts the light radiate | emitted from the 3rd optical part 15 into the line-shaped light which spreads in fan shape by the curved surface part 16b of the recessed part 16a of a semi-conical shape, and the 4th optical part 16 is. It emits from the side peripheral surface 16c.

  That is, the spot-like light that is incident on the optical element 2 so as to cover both the bottom surfaces 3a and 4a has a horizontal line shape and a parallel line shape with respect to the incident direction of the spot-like light. The light is divided into two types and emitted from the optical element 2.

  Next, the operation of the laser marking device 9 using the laser line display 1 using such an optical element 2 will be described. When the laser marking device 9 is installed and operated on the floor surface 10a of the room 10 as shown in FIG. 9, the laser marking device 9 spreads vertically in a fan shape from the laser emission point o of the laser marking device 9 to the floor surface 10a. A line-shaped light B is emitted to irradiate a line composed of points i, j, k, and O ′ onto the floor surface 10a, the wall surface 10c, and the ceiling surface 10b, and horizontally from the laser emission point o to the floor surface 10a. A line-shaped light A spreading in a fan shape is emitted to irradiate a line composed of points a, b, c, and d on the wall surface 10c. That is, by using this laser marking device 9, the fringe line, which is a line perpendicular to the floor surface 10 a used as the vertical reference line, is displayed over the floor surface 10 a, the wall surface 10 c, and the ceiling surface 10 b, A line that is a horizontal line can be displayed on the wall surface 10b.

  According to the present embodiment, the light emitted from the third optical unit 15 can be reflected by the semi-conical concave portion 16a of the fourth optical unit 16 to be line-shaped light, and further the first optical The portion 3 can also emit line-shaped light. Thus, the bottom surface to the light spots shaped incident from the vertical direction to the bottom surface of the optical element 2 of the optical element 2, the spot-like parallel and vertical directions relative to the direction of light two linear divided into light, it can be emitted from the optical element 2.

  Note that the fourth optical unit 16 of the present embodiment is not limited to the above-described shape, and deviates from the spirit of the present embodiment even when light is reflected or refracted using any other optical element. Can be implemented.

(Embodiment 5)
Further, the extending portions 4d, 15c, and 16d as shown in FIGS. 10A to 10F are provided in the second optical portion 4, the third optical portion 15, and the fourth optical portion 16 of the optical element 2. The first planar portions 17a and 17b and the second planar portions 18a and 18b may be provided on the third extending portion 16d of the fourth optical unit 16. In FIG. 10, the extended portions 4d, 15c, and 16d are indicated by oblique lines, and the extended portions 4d, 15c, and 16d are indicated by broken lines.

  That is, the optical element 2 used in the laser line indicator 1 of the present embodiment, the second optical unit 4, the third optical unit 15, and the fourth optical part 16, the first optical portion 3 of each The second end is integrally extended by a predetermined thickness from the common side end surface s (see FIG. 8) to the first optical unit 3 side so as to be parallel to the end surface s and have the same outer shape as the end surface s. The optical part 4 is configured by providing a first extending part 4d, the third optical part 15 by a second extending part 15c, and the fourth optical part 16 by a third extending part 16d.

  In addition, the first extending portion 4d of the second optical unit 4 Yes formed in a portion integral with the cutting face of the first optical unit 3, thereby cutting the first optical portion 3 The first optical unit 3 and the second optical unit 4 are integrally formed so that the part on the surface side is buried in the second optical unit 4. In addition, the third extending portion 16d of the fourth optical portion 16 is provided with first flat portions 17a and 17b at the upper and lower end portions of the side peripheral surface 16c serving as the outer surface, and in addition, The second flat surface portions 18a and 18b are provided on the curved surface portion 16b which is the inner surface of the concave portion 16a facing the first flat surface portions 17a and 17b. Further, as shown in FIG. 11, the first plane portions 17a and 17b are parallel to the central axis 19 of the recess 16a, and the second plane portions 18a and 18b are from a semi-conical space portion having an apex angle of 90 degrees. Because of the inner surface of the concave portion 16a, an angle of 45 degrees is formed with respect to the central axis 19 of the concave portion 16a.

  Next, the behavior when the spot-like light 20 is incident on the optical element 2 of the present embodiment will be described with reference to FIG. Here, only the light 20 reflected by the second flat portions 18a and 18b will be described, and the other light 20 is substantially the same as that of the fourth embodiment, and the description thereof will be omitted. Further, the extended portions 4d, 15c, and 16d are divided and shown by broken lines.

  First, the spot-like light 20 incident on the cut surface side of the first optical unit 3 from the direction perpendicular to the bottom surfaces 3a and 4a of the optical element 2, that is, the portion integrated with the first extending portion 4d is as follows. Since the first extending portion 4d is formed integrally with the first optical portion 3, the first extending portion 4d is not reflected by the curved surface portion 3b of the first optical portion 3, Proceeding to the second extending portion 15c of the third optical portion 15, totally reflected in the parallel direction with respect to the bottom surface 4a by the inclined surface 15a of the third optical portion 15, and the fourth optical portion from the apex side of the concave portion 16a. The light enters the third extending portion 16 d of the fourth optical unit 16 in parallel with the central axis 19 of the 16 concave portions 16 a. Then, in the third extending portion 16d of the fourth optical portion 16, the light 20 incident on the second planar portion 18a is reflected upward in the direction perpendicular to the central axis 19 by the second planar portion 18a. Thus, the spot-like light C is obtained. Since the traveling direction of the light C is perpendicular to the first flat surface portion 17a, the light C is emitted upward from the fourth optical portion 16 without being refracted by the first flat surface portion 17a. Further, the light 20 incident on the second plane portion 18b is reflected by the second plane portion 18b in the downward direction perpendicular to the central axis 19 to become spot-like light D. Since the traveling direction of the light D is perpendicular to the first planar portion 17b, the light D is emitted downward from the fourth optical portion 16 without being refracted by the first planar portion 17b. At this time, since the first plane portions 17a and 17b and the second plane portions 18a and 18b are both flat surfaces, the spot-like light is emitted from the fourth optical portion 16 without being converted into a line shape. It can be done.

  Therefore, the spot-like light 20 is newly divided into spot-like lights C and D by the first plane parts 17a and 17b and the second plane parts 18a and 18b provided in the fourth optical part 16. become.

  Next, a laser line display 1 using such an optical element 2 will be described. Laser line indicator 1, as shown in FIG. 12, at least, the optical element 2, a semiconductor laser generator 7, provided with a light projecting lens 8 for adjusting the laser beam from the semiconductor laser generator 7 The optical element 2, the semiconductor laser generator 7, and the light projecting lens 8 are arranged so that the emitted laser light enters the optical element 2 from a direction perpendicular to the bottom surface of the optical element 2 through the light projecting lens 8. It is configured.

  In the laser line display 1 configured as described above, when the semiconductor laser generator 7 emits laser light, in addition to the line-shaped lights A and B described in the fourth embodiment, the spot-shaped light described above is used. Lights C and D are emitted from the laser line display 1.

  Such a laser line display 1 is used for, for example, a laser marking device 9. When this laser marking device 9 is installed and operated on the floor surface 10a of the room 10 as shown in FIG. 13, the line-shaped light A spreading in a fan shape horizontally from the laser emission point O to the floor surface 10a is generated. A line-shaped light B that is emitted and irradiates a line composed of points a, b, c, and d onto the wall surface 10c and spreads in a fan shape vertically from the laser emission point O of the laser marking device 9 to the floor surface 10a. Then, a line composed of points i, j, k, and O ′ is irradiated onto the floor surface 10a, the wall surface 10c, and the ceiling surface 10b. Then, spot-like light C is emitted from the laser emission point O toward the ceiling surface 10b in a direction perpendicular to the floor surface 10a to irradiate the ceiling surface 10b with the upper point O ″, and from the laser emission point O. Spot-like light D is emitted vertically downward with respect to the floor surface 10a to irradiate the floor surface 10a with the lower point i '.

  In other words, by using this laser marking device 9, it is possible to display a line consisting of points a, b, c and d and a sag line consisting of points i, j, k and O '. In addition, the upper point O ″ can be displayed on the ceiling surface 10b as a vertical point used for installation of lighting fixtures, work related to the ceiling, and the like, and the lower point i ′ used for positioning with a marking line or the like attached to the floor It can be displayed on the floor surface 10a.

  According to this embodiment, the second optical unit 4, the third optical unit 15, and to extend the fourth optical part 16, the first extending portion 4d respectively, the second extending portions 15c and the third extending portion 16d are integrally provided, and the first flat surface portions 17a and 17b on the side peripheral surface 16c of the fourth optical portion 16 and the second curved surface portion 16b of the fourth optical portion 16 are provided. In addition, the first plane portions 17a and 17b are parallel to the central axis 19, and the second plane portions 18a and 18b form an angle of 45 degrees with respect to the central axis 19. It is like that. Therefore, when the spot-like light 20 parallel to the central axis 19 is incident on the concave portion 16a of the fourth optical unit 16, the spot-like light 20 is caused to enter the fourth optical unit 16 by the second plane portions 18a and 18b. Is reflected in a direction perpendicular to the central axis 19 of the first optical part 16, passes through the fourth optical part 16, and then exits from the fourth optical part 16 without being refracted by the first planar parts 17 a and 17 b. Thus, in addition to the line-shaped lights A and B, the spot-shaped light C emitted vertically upward with respect to the central axis 19 of the recess 16a and the central axis 19 of the recess 16a. it is possible to obtain a spot-like light D emitted vertically downward.

  The first plane portion and the second plane portion do not necessarily need to be provided on both the upper end side and the lower end side of the fourth optical unit, and the purpose of the present embodiment is provided if at least one is provided. It can be implemented without departing. Therefore, the light emission direction can be selected from the upward direction, the downward direction, or both directions according to the application.

  By the way, according to the optical element 2 of the present embodiment, the brightness of the spot-like lights C and D and the line-like light A can be relatively adjusted by the thickness of the first extending portion 4d. That is, as shown in FIGS. 14A to 14C, when spot-like light is incident on the bottom surfaces 3 a and 4 a of the optical element 2, the light incident from the bottom surface 3 a of the first optical unit 3 as described above. even, without light is reflected by the curved portion 3b at a portion which is formed integrally with the first extending portions 4d, will be directly transmitted light. Therefore, when the thickness of the first extending portion 4d is increased, the amount of light reflected by the curved surface portion 3b decreases, the line-shaped light A becomes darker, and the amount of light transmitted through the extending portion 4d increases. When the spot-like lights C and D become brighter and the thickness of the extended part 4d is reduced, the amount of light reflected by the curved surface part 3b increases, and the line-like light A becomes brighter and the extended part 4d The amount of transmitted light is reduced, and the spot-like lights C and D become darker. In FIG. 14, only the first optical unit 3 and the second optical unit 4 are shown, and the extended portion 4d is shown by hatching.

(Embodiment 6)
However, with such an adjustment method, there are cases where satisfactory brightness cannot be obtained for both the line-shaped light A and the spot-shaped lights C and D.

  Therefore, in the optical element 2 of the present embodiment, as compared with the optical element of the fifth embodiment, as shown in FIGS. 15 to 17, the first extended portion 4 d is cut into a substantially triangular prism shape. As a result, the curved surface portion 3b of the first optical unit 3 is exposed, and the other configuration is the same as that of the fifth embodiment, so that the description thereof is omitted. In FIG. 17, the first extending portion 4d is indicated by hatching.

  In the fifth embodiment, the first extending portion 4d is extended so as to have a uniform thickness on the first optical portion 3 side as shown in FIG. In the embodiment, as shown in FIG. 17 (a), the second optical portion 4 is formed so that the thickness decreases from both ends of the semi-cylindrical shape toward the central portion, and the first extending portion 4d is substantially omitted. It is shaped like a triangular prism. According to such a first extending portion 4d, a part of the curved surface portion 3b covered with the first extending portion 4d in FIG. 14A is exposed as shown in FIG. 17A. Therefore, the portion where the curved surface portion 3b of the first optical unit 3 is exposed has a sector shape in which the cross-sectional shape of the surface parallel to the bottom surface 3a has a central angle smaller than 180 degrees.

  When spot-like light is incident on the optical element 2 from the bottom surfaces 3a and 4a, as shown in FIGS. 17 (a) to 17 (c), the light reflected by the curved surface portion 3b is as shown in FIGS. It is converted into line-shaped light A. At this time, since the curved surface portion 3b is exposed from the first extending portion 4d as described above, the light reflected by the curved surface portion 3b increases as compared with the case of FIG. The light quantity of the light A increases. And the light which permeate | transmits the 1st extension part 4d of the 2nd optical part 4 is used for the spot-shaped light C and D, and it is in the site | part except the 1st extension part 4d of the 2nd optical part 4. The incident light is converted into the line-shaped light B as described above.

  Further, according to the present embodiment, the curved surface portion 3b of the first optical unit 3 is exposed as a shape in which the first extending portion 4d is cut out, thereby reducing the amount of light reflected by the curved surface portion 3b. Thus, the brightness of the line-shaped light A reflected by the curved surface portion 3b and the brightness of the spot-shaped lights C and D can be adjusted to arbitrary values.

  In addition, when the optical element 2 of this embodiment is used for the laser line display 1, the cross-sectional shape in the surface where the curved surface portion 3b of the first optical portion 3 is exposed is parallel to the bottom surface 3a has a central angle. As shown in FIG. 18, the irradiation range of the line-shaped light A is narrow because the fan has an angle smaller than 180 degrees. However, when the laser line display 1 is actually used, such a line shape is used. In many cases, it is not necessary to irradiate the horizontal line of the light A over 180 degrees, so that it can be used without any problem.

It is a schematic explanatory drawing of the laser line display using the optical element of Embodiment 1 of this invention. (A) is a perspective view of the above optical element, (b) is a side view of the above optical element, (c) is a top view of the above optical element, (d) It is the other side view of the optical element same as the above. It is operation | movement explanatory drawing of a laser marking device same as the above. (A) is a perspective view of the optical element of Embodiment 2 of the present invention, (b) is a side view of the optical element of the above, (c) is a top view of the optical element of the above, (d) is a side view on the other side of the optical element of the same. It is a perspective view of an optical element of Embodiment 3 of the present invention. (A) is a perspective view of the other optical element of Embodiment 3 of this invention, (b) is a perspective view from the other direction of the optical element same as the above. It is operation | movement explanatory drawing of a laser marking device same as the above. (A) is a perspective view of the optical element of Embodiment 4 of this invention, (b) is a perspective view from the other direction of the optical element same as the above. It is operation | movement explanatory drawing of a laser marking device same as the above. (A) is a perspective view of the optical element of Embodiment 5 of this invention, (b) is a top view of the optical element same as the above, (c) is a perspective view from the other direction of the optical element same as the above. (D) is a front view of the above-described optical element, (e) is a side view of the above-described optical element, and (f) is a rear view of the above-described optical element. It is a schematic explanatory drawing when light injects into the optical element same as the above. It is a schematic illustration of a laser line display device using the optical element of the same. It is operation | movement explanatory drawing of a laser marking device same as the above. (A) is the top view which abbreviate | omitted the 3rd optical part and 4th optical part of the optical element same as the above, (b) is the side view of the figure (a), (c), It is a side view from the other direction of the figure (a). (A) is a perspective view of the optical element of Embodiment 6 of this invention, (b) is a top view of the optical element same as the above, (c) is a perspective view from the other direction of the optical element same as the above. (D) is a front view of the optical element of the same, (e) is a side view of the optical element of the same, (f) is a rear view of the optical element of the same, ( g) is a bottom view of the optical elements of the same. (A) is a perspective view from the lower direction of the optical element same as the above, (b) is a perspective view from the side surface direction of the optical element same as the above, and (c) is an upper direction of the optical element same as the above. (D) is a perspective view from still another direction of the optical element same as above. (A) is the top view which abbreviate | omitted the 3rd optical part and 4th optical part of the optical element same as the above, (b) is the side view of the figure (a), (c), It is a side view from the other direction of the figure (a). It is a schematic illustration of a laser line display device using the optical element of the same.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Laser line indicator 2 Optical element 3 1st optical part 3a Bottom surface 3b Curved surface part 4 2nd optical part 4a Bottom surface 4b Upper surface 4c Side peripheral surface 7 Semiconductor laser generator 8 Light projection lens

Claims (13)

  A first surface having a semi-conical shape having a cut surface that is a surface perpendicular to the bottom surface passing through the central axis of the cone, and having a reflective surface that reflects light incident from the bottom surface in the direction of the cut surface And a semi-cylindrical shape with a plane perpendicular to the bottom surface passing through the central axis of the cylinder, and the light incident from the bottom surface is transmitted from the surface facing the bottom surface and the light incident from the cut surface And the second optical part that transmits through the semicircular cylindrical side peripheral surface, the cutting surface of the first optical part and the cutting surface of the second optical part are made common to each other, and the first optical part said the central axis of the cone of the optical portion and the second of the central axis is matched to the cylindrical optical unit, the optical element characterized by being formed integrally.   The first optical unit is arranged between the bottom surface and the reflection surface so that light incident on the reflection surface from a direction perpendicular to the bottom surface through the bottom surface is totally reflected by the reflection surface toward the cut surface. The optical element according to claim 1, wherein the angle is set to be equal to or greater than a critical angle.   The optical element according to claim 1, wherein a reflective film that reflects light outward is formed on a surface portion of the reflective surface.   A third optical unit is integrally formed on a surface facing the bottom surface of the second optical unit, and the third optical unit is incident from the bottom surface of the second optical unit and is opposed to the bottom surface. The optical element according to claim 1, wherein the emitted light is configured to reflect or refract light.   The said 3rd optical part is comprised so that the light inject | emitted from the bottom face of the said 2nd optical part and radiate | emitted from the surface facing a bottom face may be totally reflected. Optical element.   A fourth optical unit is integrally formed on a surface from which light whose optical path has been changed by the third optical unit is emitted from the third optical unit, and the fourth optical unit is configured to be the third optical unit. the optical element according to claim 4 or 5, wherein it is configured to reflect or refract light optical path is changed by.   The fourth optical part, said third optical element according to claim 6, characterized in that it has a recess substantially conical shape diverging forward outwardly from the optical portion of the.   A first flat surface portion is provided on at least one of the upper and lower end portions of the fourth optical portion, and a second flat surface portion is provided on the inner surface of the concave portion facing the first flat surface portion. The optical element according to claim 7.   The second optical unit, the third optical unit, and the fourth optical unit are provided so as to have a common end surface on the first optical unit side, and the first optical unit is connected to the first optical unit from the end surface. Extending integrally to the optical part side by a predetermined thickness in parallel with the end face, the second optical part to the first extension part, the third optical part to the second extension part, the second A third extending portion is provided in the optical portion of 4, and the first extending portion is formed integrally with a portion of the first optical portion on the cut surface side, and is a bottom surface of the first optical portion. Is transmitted through the second extension, and the second extension reflects the light incident from the first extension and emits the light to the third extension. The third extending portion has a first flat surface portion on at least one of the outer surfaces of the upper end portion or the lower end portion thereof, and the inner portion of the extending portion facing the first flat surface portion. 8. The apparatus according to claim 7, further comprising: a second planar portion, wherein light incident from the second extending portion is reflected by the second planar portion and is emitted from the first planar portion. The optical element described.   The optical element according to claim 9, wherein a curved surface portion of the first optical portion embedded in the first extension portion is partially exposed from the first extension portion.   The first plane portion is parallel to the central axis of the concave portion, and the second plane portion forms an angle of 45 degrees with respect to the central axis of the concave portion of the fourth optical unit. The optical element according to claim 8.   The cutting surface of the first optical unit is a surface passing through the central axis of the cone and perpendicular to the bottom surface, and the cutting surface of the second optical unit is a surface passing through the central axis of the cylinder and perpendicular to the bottom surface. the optical element according to any one of claims 1 to 11, wherein the.   At least the optical element according to any one of claims 1 to 12, a semiconductor laser generator, and a light projecting lens, wherein the laser light emitted from the semiconductor laser generator is transmitted through the light projecting lens. A laser line display comprising: the optical element, the semiconductor laser generator, and the light projecting lens arranged so as to be incident on the optical element from a vertical direction on a bottom surface of the optical element.

Images