CN1704645A - Lens base, light guiding device and light irradiation device - Google Patents
Lens base, light guiding device and light irradiation device Download PDFInfo
- Publication number
- CN1704645A CN1704645A CNA2005100735511A CN200510073551A CN1704645A CN 1704645 A CN1704645 A CN 1704645A CN A2005100735511 A CNA2005100735511 A CN A2005100735511A CN 200510073551 A CN200510073551 A CN 200510073551A CN 1704645 A CN1704645 A CN 1704645A
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- Prior art keywords
- light guide
- light
- lens holder
- end portion
- recess
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- 230000003287 optical effect Effects 0.000 claims description 43
- 230000002093 peripheral effect Effects 0.000 claims description 30
- 239000012141 concentrate Substances 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000011162 core material Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
- G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
- G02B6/003—Lens or lenticular sheet or layer
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4256—Details of housings
- G02B6/426—Details of housings mounting, engaging or coupling of the package to a board, a frame or a panel
- G02B6/4261—Packages with mounting structures to be pluggable or detachable, e.g. having latches or rails
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/14—Mountings, adjusting means, or light-tight connections, for optical elements for lenses adapted to interchange lenses
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Lens Barrels (AREA)
- Optical Couplings Of Light Guides (AREA)
- Securing Globes, Refractors, Reflectors Or The Like (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
Abstract
The lens holder 10 is equipped with: a cylindrical part 11 which is attachable to and detachable from the tip end 21 of a light guide 20, which converges light beams emitted from the light emitting end 21a of the tip end 21, and which has an annular recess 11a provided in the inner circumferential face, wherein the annular recess 11a is arranged opposite to the annular groove 21b formed on the outer circumferential face at the tip end 21 of the light guide 20; a lens 12 which is fixed on the tip end side of the cylindrical part 11; and a ring member 13 which is housed in the groove 21b on the light guide 20 end and in the recess 11a on the cylindrical part 11 end and which is elastically deformable in the radial direction.
Description
Technical Field
The present invention relates to a lens holder that can be attached to and detached from a distal end portion of a light guide, a light guide device including the lens holder and the light guide, and a light irradiation device including the light guide device.
Background
The light irradiation device (point light source device) irradiates light onto an irradiation object by guiding the light supplied from the light source by the light guide. The light irradiation device can be used without a condenser lens if the position of the object to be irradiated is 5 to 10mm away from the front end of the light guide. However, when the irradiated object is located at a place more than 15mm away, a collective lens is preferably used. As a method of fixing the lens to the light guide, as disclosed in japanese laid-open patent publication No. 2001-250409, a method of fixing a lens holder for holding the lens to the light guide by screws may be used.
Disclosure of Invention
However, with the above method, the user must use a tool to turn the screw when replacing the lens. In addition, since the screw is very small, the user often loses the screw, and the convenience is poor.
It is an object of the present invention to provide a lens holder, a light guide device, and a light irradiation device which are highly convenient.
The lens holder of the present invention is a lens holder which is attachable to and detachable from a distal end portion of a light guide and concentrates light emitted from a light emitting end of the distal end portion, the lens holder including: a cylindrical portion having an inner peripheral surface provided with an annular recess portion disposed to face an annular groove portion formed in an outer peripheral surface of the distal end portion of the light guide; a lens fixed to a distal end side of the cylindrical portion; and a ring member that is accommodated in the groove portion on the light guide side and the recessed portion on the cylindrical portion side and is elastically deformable in a radial direction.
In the lens holder of the present invention, when the distal end portion of the light guide is inserted into the base end portion of the cylindrical portion, the ring member is accommodated in the recess of the cylindrical portion through the outer peripheral surface of the distal end of the light guide and elastically deformed radially outward, and then the ring member is accommodated in the groove portion of the distal end portion of the light guide. The ring member is accommodated in the groove of the light guide and functions as a stopper in the groove, and the lens holder is fixed to the light guide with a predetermined elastic force. Therefore, the lens holder can be attached to and detached from the light guide by merely applying a force to insert and remove the cylindrical portion of the lens holder from the light guide along the optical axis direction. Therefore, a tool for rotating the screw is not required, and the lens can be attached and detached without using a small part (for example, a screw or the like) which may be lost, thereby improving the convenience of the lens holder.
That is, the first lens holder of the present invention includes a cylindrical member (i.e., a cylindrical portion), a lens, and a ring member. The tubular member is a tubular member extending in a predetermined axial direction. The tubular member includes a base end portion and a tip end portion in this order in the predetermined axial direction. An annular recess is provided on the inner peripheral surface of the base end portion. The lens is disposed in an inner bore formed by the front end. The ring member is elastically deformable in a radial direction and is held in the recess. The recess has a size that the ring member can retract. The ring member has an inner diameter smaller than that of the base end portion in a natural state.
The first lens holder is attachable to and detachable from a light guide having a groove portion facing the recess in a radial direction and facing the ring member in a predetermined axial direction (i.e., optical axial direction) without using screws. That is, when the recess of the cylindrical member faces the groove of the light guide, the lens holder is fixed to the light guide by facing the side surface forming the groove of the light guide. On the other hand, the ring member is retracted into the recess of the tubular member when coming into contact with the outer peripheral surface of the distal end portion other than the groove portion, and therefore, the lens holder is easily moved in the predetermined axial direction with respect to the light guide. The size of the recess in which the ring member can be retracted is a size in which the ring member can be retracted in the radial direction to move the light guide. Therefore, the recessed portion may have a size capable of completely accommodating the ring member in contact with the outer peripheral surface of the distal end portion other than the groove portion. The recessed portion may have a dimension in which a part of the ring member that contacts the outer peripheral surface of the distal end portion other than the groove portion can protrude.
More specifically, in the lens holder, the ring member is preferably a spiral O-ring. That is, the second lens holder of the present invention is characterized in that the ring member of the first lens holder is a spiral O-ring. The durability of the ring member can be improved by using the O-ring.
In the lens holder, it is preferable that the ring member is a C-shaped ring, and ends thereof are offset from each other so as to be elastic in the optical axis direction. That is, the third lens holder according to the present invention is characterized in that the ring member of the first lens holder is a C-ring, and both ends of the C-ring are separated from each other so as to have elasticity in the predetermined axial direction. Since such a ring member has elasticity in the optical axis direction, when accommodated in a recess having a width smaller than the width of the C-ring in the optical axis direction, the ring member is compressed in the optical axis direction and is in a state of being hardly loosened. In addition, when not compressed, the C-ring ends are offset from each other and have a predetermined width in the optical axis direction, so that the state is still free from backlash. Therefore, with the present invention, when the lens holder is fixed to the light guide, looseness in the optical axis direction can be reduced.
In the lens holder, the depth of the recess on the cylindrical portion side is preferably larger than the depth of the groove portion of the light guide. That is, the fourth lens holder according to the present invention is characterized in that the depth of the recess on the cylindrical portion side of any of the first to third lens holders is deeper than the depth of the groove on the light guide side. With this structure, the light guide can be easily attached and detached.
In the lens holder, it is preferable that the cylindrical portion is fitted to the engaging convex portion of the light guide along the optical axis direction so that a base end surface of the cylindrical portion collides with the engaging convex portion provided at the front end portion of the light guide and a step surface provided at a boundary portion of the main body portion of the light guide, and the ring member is in contact with the front end surface of the groove portion and the rear end surface of the concave portion. That is, the fifth lens holder according to the present invention is any one of the first to fourth lens holders in which the cylindrical portion is fitted to the engaging convex portion of the light guide along the optical axis direction so that the base end surface of the cylindrical portion collides with the engaging convex portion provided at the front end portion of the light guide and the step surface provided at the boundary portion of the main body portion of the light guide, and the ring member contacts the front end surface of the groove portion and the rear end surface of the concave portion. With this configuration, when the lens holder is attached to the light guide, the looseness in the optical axis direction can be reduced as much as possible, and the lens holder can be fixed more firmly.
In the lens holder, the length of the cylindrical portion-side recess in the optical axis direction is preferably shorter than the length of the light guide-side groove portion in the optical axis direction. That is, the sixth lens holder according to the present invention is any one of the first to fifth lens holders in which the length of the cylindrical portion side recess in the optical axis direction is shorter than the length of the light guide side groove portion in the optical axis direction. With this configuration, the recess of the lens holder can be more reliably opposed to the groove of the light guide.
The light guide device of the present invention includes: a light guide for emitting the light supplied from the light supply device from the light emitting end; and a lens holder which is attachable to and detachable from the front end portion of the light guide and concentrates light emitted from the light emitting end of the front end portion, characterized in that: the lens holder includes: a cylindrical portion having an annular recess formed on an inner circumferential surface thereof, the annular recess being disposed to face an annular groove formed on an outer circumferential surface of a front end portion of the light guide; a lens fixed to the front end side of the cylindrical portion; and a ring member that is housed in the groove portion on the light guide side and the recessed portion on the cylindrical portion side and is elastically deformable in the radial direction.
That is, the light guide device of the present invention includes: the lens holder includes a light guide having a distal end portion including a light emitting end from which light is emitted, and a lens holder detachably attached to the distal end portion of the light guide. Any one of the first to sixth lens holders may be used as the lens holder of the light guide device. The ring member retracts in the recess of the cylindrical member while contacting the outer peripheral surface of the distal end portion. The ring member faces the groove of the light guide in the predetermined axial direction in a state where the groove of the light guide faces the recess of the cylindrical member. That is, the ring member faces the side surface of the groove forming the light guide.
In the lens holder used in the light guide device of the present invention, when the distal end portion of the light guide is inserted into the base end portion of the cylindrical guide portion, the ring member is accommodated in the recess of the cylindrical portion through the outer peripheral surface of the distal end portion of the light guide and elastically deformed radially outward, and then the ring member is accommodated in the groove portion of the distal end portion of the light guide. The ring member housed in the groove of the light guide functions as a stopper in the groove, and the lens holder is fixed to the light guide with a predetermined elastic force. Therefore, the lens holder can be attached to and detached from the light guide by merely applying a force to insert and remove the cylindrical portion of the lens holder from the light guide along the optical axis direction. Therefore, a tool for rotating the screw is not required, and the lens can be attached and detached without using a small part (for example, a screw or the like) which may be lost, thereby improving the convenience of the lens holder.
The light irradiation device of the present invention includes: a light supply device having a light source; a light guide for emitting the light supplied from the light supply device from the light emitting end; and a lens holder which is attachable to and detachable from the front end portion of the light guide and concentrates light emitted from the light emitting end of the front end portion, characterized in that: the lens holder includes: a cylindrical portion having an annular recess formed on an inner circumferential surface thereof, the annular recess being disposed to face an annular groove formed on an outer circumferential surface of a front end portion of the light guide; a lens fixed to the front end side of the cylindrical portion; and a ring member that is housed in the groove portion on the light guide side and the recessed portion on the cylindrical portion side and is elastically deformable in the radial direction.
That is, the light irradiation device of the present invention includes: a light supply device having a light source; a light guide having a front end portion including a light emitting end that emits the light supplied from the light supply device; and a lens holder that is attachable to and detachable from the front end portion of the light guide. In the lens holder of the light irradiation device, any one of the first to sixth lens holders may be used. The ring member retracts in the recess of the cylindrical member while contacting the outer peripheral surface of the front end. The ring member faces the groove of the light guide in the predetermined axial direction in a state where the groove of the light guide faces the recess of the cylindrical member. That is, the ring member faces the side surface of the groove forming the light guide.
In the lens holder used in the light irradiation device of the present invention, when the distal end portion of the light guide is inserted into the base end portion of the cylindrical guide portion, the ring member is accommodated in the recess of the cylindrical portion through the outer peripheral surface of the distal end portion of the light guide and elastically deformed radially outward, and then the ring member is accommodated in the groove portion of the distal end portion of the light guide. The ring member housed in the groove of the light guide functions as a stopper in the groove, and the lens holder is fixed to the light guide with a predetermined elastic force. Therefore, the lens holder can be attached to and detached from the light guide by merely applying a force to insert and remove the cylindrical portion of the lens holder from the light guide along the optical axis direction. Therefore, a tool for rotating the screw is not required, and the lens can be attached and detached without using a small part (for example, a screw or the like) which may be lost, thereby improving the convenience of the lens holder.
Drawings
Fig. 1 is a perspective view showing one embodiment of a light irradiation device of the present invention.
Fig. 2 is a sectional view showing a state where the lens holder is attached to the light guide.
Fig. 3 is a sectional view showing the structure of the lens holder.
Fig. 4 shows a first example of the ring member, in which (a) is a front view and (b) is a side view.
Fig. 5 is a side view showing the front end of the light guide.
Fig. 6 is a view showing a second example of the ring member, in which (a) is a front view and (b) is a side view.
Fig. 7 is a sectional view showing another embodiment of a state where the lens holder is attached to the light guide.
Fig. 8 is a view showing a third example of the ring member, in which (a) is a front view and (b) is a side view.
Fig. 9 shows a fourth example of the ring member, in which (a) is a front view and (b) is a side view.
Detailed Description
Hereinafter, preferred embodiments of the lens holder, the light guide device, and the light irradiation device according to the present invention will be described in detail with reference to the drawings.
As shown in fig. 1, the transportable light irradiation device 1 includes: a light supply device 30 for supplying light to be irradiated on the object to be irradiated, and a light guide device 2 for transmitting the light supplied by the light supply device 30 and irradiating the light on the object to be irradiated. The light supply device 30 includes a metal housing 33, and a replaceable light source 31 including a discharge tube, an elliptical reflector for concentrating light emitted from the light source 31, and the like are housed in the housing 33. The light generated by the light source 31 corresponds to Ultraviolet (UV), for example.
As shown in fig. 1 and 2, the light guide device 2 includes a lens holder 10 and a light guide 20. The lens holder 10 is detachable from the front end 21 of the light guide 20, and concentrates the light emitted from the light emitting end 21a of the light guide 20. The light guide 20 is detachable from the connection portion 32 of the light supply device 30 at the rear end portion thereof, and the light supplied from the light supply device 30 is transmitted through the main body portion 22 of the light guide 20 and emitted from the light emitting end 21 a. The main body 22 of the light guide 20 is configured as a metal flexible tube into which the optical fiber F is press-fitted.
As shown in fig. 2 and 3, the lens holder 10 is detachable from the distal end portion 21 of the light guide 20, and includes a cylindrical portion 11, a lens 12, and a ring member 13. The cylindrical portion 11 is made of metal such as aluminum, and the distal end 11c of the cylindrical portion 11 is made cylindrical so as to accommodate the cylindrical lens 12, and the lens 12 is press-fitted into the cylindrical portion 11. In addition, as shown in fig. 3, in order to position the lens 12 within the cylindrical portion 11, a stepped portion 11b is provided at a substantially center within the inner wall of the cylindrical portion 11. When the lens 12 is fixed in the cylindrical portion 11, the rear end of the lens 12 collides with the step portion 11b, and the front end of the cylindrical portion 11 is pressed inward, whereby the lens 12 is firmly fixed to the front end of the cylindrical portion 11. Here, the lens 12 used is a convex lens that concentrates the light emitted from the light emitting end 21a of the light guide 20, and is made of quartz glass or the like.
That is, the lens holder 11 is formed in a cylindrical shape extending in a predetermined axial direction. The lens holder 11 includes a base end portion 11d and a tip end portion 11c in this order in the predetermined axial direction. The lens 12 is disposed in an inner hole defined by the front end portion 11c, and the lens 12 is held by the front end portion 11 c. The inner diameter of the tip portion 11c is larger than that of the base portion 11d, and the boundary between the tip portion 11c and the base portion 11d is formed as a stepped surface (i.e., a stepped portion 11b) for colliding with the lens 12. The base end portion 11d constitutes an inner hole that receives the tip portion 21 of the light guide 20.
As shown in FIGS. 2 and 3, the base end portion 11d of the cylindrical portion 11 is formed in a cylindrical shape so that the cylindrical distal end portion 21 of the light guide 20 can be inserted therein, and the inner diameter d of the base end portion 11d of the cylindrical portion 111Is larger than the outer diameter d of the front end 21 of the light guide 202(see fig. 5) is slightly larger. Inner diameter d of cylindrical portion 11 of lens holder 101The dimension of the front end 21 of the light guide 20 with less radial play is selected. An annular recess 11a is provided on the inner peripheral surface of the cylindrical portion 11, and a ring member 13 is housed in the recess 11 a. That is, the ring member 13 placed in the recess 11a is held by the face forming the recess 11 a.
As shown in fig. 4, the ring member 13 is an O-ring formed by spirally rounding a spring wire, and is elastically deformable in the radial direction. In addition, the ring member 13 is in contact with a wire rod that is rounded into a spiral shape in the optical axis L direction. Wherein the wire diameter is about 0.6 mm. Outer diameter d of ring member 133Is larger than the inner diameter d of the cylindrical part 11 of the lens holder 101(see fig. 3) is large so that the ring member 13 can be housed in the recess 11a of the lens holder 10. For example, when the inner diameter d1In the case of 6mm, the outer diameter d of the ring member 13 is preferably set3About 6.9 mm.
As shown in fig. 2 and 3, the width w of the recess 11a on the lens holder 10 side in the optical axis L direction1To accommodate the width of the ring member 13. That is, the width w of the ring member 13 in the optical axis L direction (see fig. 4 b) is not less than the width w. For example, when the ring member 13 has a diameter of 0.6mm in a case where the wire members forming the ring member 13 are spirally overlapped, the width of the concave portion 11a in the optical axis L direction is preferably about 1.3 to 1.4 mm.
When the distal end portion 21 of the light guide 20 is inserted into the lens holder 10, the distal end portion 21 comes into contact with the ring member 13, and therefore the depth of the recess 11a of the lens holder 10 is set to be equal to or greater than the thickness of the wire material forming the ring member 13. For example, when the wire rod has a thickness of 0.6mm, the depth of the recess 11a is preferably about 0.6 to 0.7 mm. That is, the recess 11a is sized to retract the wire of the ring member 13 when the ring member 13 is in contact with the outer peripheral surface of the distal end portion 21 other than the groove portion 21 b.
As shown in fig. 1, 2, and 5, the light guide 20 includes: a front end portion 21 as a portion to be engaged with the lens holder 10; and a light guide main body 22 connected to the connection portion 32 of the light supply device 30 at the base end portion and transmitting the light supplied from the light supply device 30. The light guide body 22 transmits light through a core member provided therein. Quartz glass or liquid having high ultraviolet transmittance can be used as the core material.
As shown in fig. 5, the distal end portion 21 of the light guide 20 is formed into a cylindrical shape and inserted into the proximal end portion 11d of the cylindrical portion 11 of the lens 10. For example, when the inner diameter d of the cylindrical part 11 of the lens holder 101Preferably, the outer diameter d of the tip portion 21 of the light guide 20 is 6mm2Less than 6mm, the radial play is as small as possible.
Outer diameter d of front end 21 of light guide 202Is larger than the inner diameter d of the ring member 13 of the lens holder 104Is large. This is because the leading end portion 21 can expand the ring member 13 once in the radial direction. For example, if the outer diameter d of the tip portion 212Is 6mm, the inner diameter d of the ring part 13 is4May be about 5.7 mm. Further, the ring member 13 has an inner diameter d in a natural state4Is smaller than the inner diameter of the proximal end portion 11 d.
A light emitting end 21a for emitting the light supplied from the light supply device 30 is provided at the distal end 21 of the light guide 20, and an annular groove 21b is formed in the outer peripheral surface of the distal end 21. As shown in fig. 2 and 5, in order to position the lens holder 10, a step surface 22a is formed at a boundary portion between the joining convex portion 21c provided at the distal end portion 21 and the light guide body portion 22, and the base end surface 11e of the cylindrical portion 11 of the lens holder 10 collides with the step surface 22 a.
The length of the groove 21b on the light guide 20 side in the optical axis L direction is longer than the length of the recess 11a on the lens holder 10 side in the optical axis L direction, as long as the ring member 13 can be accommodated therein. For example, if the length of the recess 11a in the direction of the optical axis L is 2mm, the length of the groove 21b in the direction of the optical axis L may be about 3 mm.
In addition, in order to more easily detach the light guide 20, the depth of the recess 11a on the lens holder 10 side is deeper than the depth of the groove 21b on the light guide 20 side. For example, if the depth of the groove 21b on the light guide 20 side is 0.1mm, the depth of the recess 11a on the lens holder 10 side is preferably 0.6 to 0.7 mm. The depth of the recess 11a is appropriately determined by the diameter of the wire of the ring member 13.
As shown in fig. 2, when the lens holder 10 is attached to the light guide 20, the recess 11a and the groove 21b are disposed to face each other. In particular, when the cylindrical portion 11 of the lens holder 10 is fitted to the distal end portion 21 of the light guide 20, the distal end of the recess 11a and the distal end of the groove 21b preferably substantially coincide with each other. That is, as shown in fig. 2, the length from the base end surface 11e of the lens holder 10 to the front end of the recess 11a is preferably substantially the same as the length from the stepped surface 22a of the light guide 20 to the front end of the groove 21b (e.g., about 7 mm).
Here, when the distal end portion 21 of the light guide 20 is inserted from the proximal end side of the cylindrical portion 11 of the lens holder 10, the ring member 13 is elastically deformed radially outward along the outer peripheral surface of the distal end portion 21 of the light guide 20 while being accommodated in the recess 11a of the cylindrical portion 11. Then, as shown in fig. 2, the ring member 13 is housed in the groove 21b of the distal end portion 21 of the light guide 20. The ring member 13 housed in the distal end portion 21b of the light guide 20 functions as a stopper in the groove portion 21b, and the lens holder 10 is fixed to the light guide 20 by a predetermined spring force.
In this way, when light is supplied from the light supply device 30 to the light guide 20 in a state where the lens layer 10 is fixed to the light guide 20, the light is emitted from the light emitting end 21a provided at the distal end portion 21 of the light guide 20, and is concentrated by the lens 12 of the lens holder 10 to be irradiated onto the object.
When the lens holder 10 is replaced, the cylindrical portion 11 of the lens holder 10 can be inserted and removed in the optical axis L direction only by applying a force, and the lens holder 10 can be attached to and detached from the light guide 20. Thus, the lens 12 can be attached and detached without using a tool for screwing a screw or the like and without using a small part which may be lost, and the convenience of the lens holder 10 is improved. Further, the light guide device 2 and the light irradiation device 1 having such a lens holder 10 also have high convenience, respectively.
Further, since the ring member 13 for fixing the lens holder 10 to the light guide 20 is accommodated in the recess 11a provided on the inner peripheral surface of the lens holder 10, it is not in a peeled state, and is less likely to be damaged or lost due to elongation or deformation. Further, since the ring member 13 is simply housed in the recess 11a, when the ability to fix the lens holder 10 is reduced by abrasion or the like, the fixing ability can be restored by exchanging only the ring member 13. Further, if the ring member 13 is formed as a spiral O-ring, the durability of the ring member can be improved. Further, if the depth of the recess 11a on the lens holder 10 side is made deeper than the depth of the groove 21b on the light guide 20 side, the light guide 20 can be attached and detached more easily. Further, if the length of the recess 11a on the lens holder 10 side in the optical axis L direction is made shorter than the length of the groove 21b on the light guide 20 side in the optical axis L direction, the recess 11a and the groove 21b can be reliably opposed to each other.
The ring member used in the present embodiment may be a ring member 14 as shown in fig. 6. As shown in fig. 6, the ring member 14 is a C-shaped ring, while its ends are offset from each other so as to have elasticity in the optical axis L direction. Wherein the opening angle of both ends of the ring member 14 is approximately 60 ° when viewed from the center.
Fig. 7 is a sectional view showing a state in which the lens holder 10 is fixed to the light guide 20 by using the ring member 14. As shown in fig. 7, the ring member 14 is compressed in the optical axis L direction, and is brought into contact with the front end surface 21d of the groove 21b on the light guide 20 side and the rear end surface 11f of the recess 11a on the lens holder 10 side. The width of the recess 11a on the lens holder 10 side in the optical axis L direction is smaller than the width of the ring member 14 in the optical axis L direction due to the end portions being offset from each other, and the ring member 14 is accommodated in the recess 11a in a state of being compressed in the optical axis L direction.
With the above configuration, since the ring member 14 is accommodated in the concave portion 11a on the lens holder 10 side in a compressed state, it is possible to reduce the backlash in the optical axis L direction when fixing the lens holder 10 to the light guide 20. Further, since the ring member 14 is in contact with the rear end 11f of the concave portion 11a on the lens holder 10 side and the base end surface 11e of the cylindrical portion 11 is in contact with the stepped surface 22a formed at the boundary portion between the engaging convex portion 21c of the distal end portion 21 and the lens holder main body portion 22, the looseness can be minimized and the fixation can be made more reliable.
Further, since the ring member 14 is a C-shaped ring, the width of the recess 11a on the lens holder 10 side in the optical axis L direction can be narrowed, and the occurrence of backlash can be reduced. In addition, the ring member 14 can be more easily accommodated in the recess 11 a. Further, a C-ring 15 having no offset as shown in fig. 8 may also be used as the ring member. Further, since the optical ring can be compressed in the optical axis L direction, the O-ring 16 in which the spirally rounded wire material shown in fig. 9 is separated in the optical axis L direction may be used as the ring member. In the O-ring 16, the diameter of the wire is preferably 0.6mm, and the width w in the optical axis L direction2About 1.5 mm.
As described above, according to the preferred embodiment of the present invention, the lens holder of the present invention can be attached to and detached from the light guide by applying a force for inserting and removing the cylindrical portion into and from the distal end of the light guide, thereby improving the convenience. The lens holder of the light guide device of the invention can be assembled and disassembled on the light guide by applying the force for inserting and extracting the cylindrical part at the front end of the light guide, thereby improving the convenience. The lens holder of the light irradiation device of the present invention can be attached to and detached from the light guide by applying a force for inserting and removing the cylindrical portion into and from the front end of the light guide, thereby improving convenience.
Claims (11)
1. A lens holder which is attachable to and detachable from a distal end portion of a light guide and concentrates light emitted from a light emitting end of the distal end portion, the lens holder comprising:
a cylindrical portion having an inner peripheral surface provided with an annular recess portion disposed to face an annular groove portion formed in an outer peripheral surface of the distal end portion of the light guide;
a lens fixed to a distal end side of the cylindrical portion; and
and a ring member that is accommodated in the groove on the light guide side and the recess on the cylindrical portion side and is elastically deformable in a radial direction.
2. The lens holder of claim 1, wherein:
the ring member is a helical O-ring.
3. The lens holder of claim 1, wherein:
the ring member is a C-ring, while its ends are offset from each other so as to be elastic in the optical axis direction.
4. The lens holder of claim 1, wherein:
the depth of the recess on the cylindrical portion side is deeper than the depth of the groove on the light guide side.
5. The lens holder of claim 1, wherein:
the cylindrical portion is fitted to the engaging convex portion of the light guide along the optical axis direction so that a base end surface of the cylindrical portion collides with an engaging convex portion provided at the distal end portion of the light guide and a step surface provided at a boundary portion of a main body portion of the light guide,
the ring member is in contact with a front end surface of the groove and a rear end surface of the recess.
6. The lens holder of claim 5, wherein:
the length of the recess on the cylindrical portion side in the optical axis direction is shorter than the length of the groove on the light guide side in the optical axis direction.
7. A lens holder, characterized in that:
the method comprises the following steps:
a tubular member formed in a tubular shape extending in a predetermined axial direction, the tubular member including a base end portion and a tip end portion in this order in the predetermined axial direction, an annular recess being provided in an inner peripheral surface of the base end portion;
a lens disposed in an inner bore formed by the tip portion; and
a ring member elastically deformable in a radial direction and held in the recess, wherein,
the recess has a size in which the ring member can retreat,
the ring member has an inner diameter smaller than an inner diameter of the base end portion in a natural state.
8. A light guide device has: a light guide for emitting the light supplied from the light supply device from the light emitting end; and a lens holder which is attachable to and detachable from a front end portion of the light guide and concentrates light emitted from a light emitting end of the front end portion, characterized in that:
the lens holder includes:
a cylindrical portion having an inner peripheral surface provided with an annular recess portion disposed to face an annular groove portion formed in an outer peripheral surface of the distal end portion of the light guide;
a lens fixed to a distal end side of the cylindrical portion; and
and a ring member that is accommodated in the groove on the light guide side and the recess on the cylindrical portion side and is elastically deformable in a radial direction.
9. A light guide device, characterized in that:
the method comprises the following steps: a light guide having a front end portion including a light emitting end from which light is emitted, and a lens holder that is detachably attached to the front end portion of the light guide; wherein,
the lens has:
a tubular member formed in a tubular shape extending in a predetermined axial direction, the tubular member including a base end portion and a tip end portion in this order in the predetermined axial direction, an annular recess being provided in an inner peripheral surface of the base end portion;
a lens disposed in an inner bore formed by the tip portion; and
a ring member elastically deformable in a radial direction and held in the recess,
an annular groove portion disposed to face the recessed portion is formed on an outer peripheral surface of the distal end portion,
the recess has a size in which the ring member can retreat,
the ring member is accommodated in the recessed portion in a state of being in contact with the outer peripheral surface of the distal end portion, and faces the groove portion along the predetermined axial direction in a state of facing the groove portion to the recessed portion.
10. A light irradiation device comprising: a light supply device having a light source; a light guide for emitting the light supplied from the light supply device from the light emitting end; and a lens holder which is attachable to and detachable from a front end portion of the light guide and concentrates light emitted from a light emitting end of the front end portion, characterized in that:
the lens holder includes:
a cylindrical portion having an inner peripheral surface provided with an annular recess portion disposed to face an annular groove portion formed in an outer peripheral surface of the distal end portion of the light guide;
a lens fixed to a distal end side of the cylindrical portion; and
and a ring member that is accommodated in the groove on the light guide side and the recess on the cylindrical portion side and is elastically deformable in a radial direction.
11. A light irradiation device characterized by:
the method comprises the following steps:
a light supply device having a light source;
a light guide having a front end portion including a light emitting end that emits the light supplied from the light supply device; and
a lens holder which is detachably attached to the front end portion of the light guide; wherein,
the lens has:
a tubular member formed in a tubular shape extending in a predetermined axial direction, the tubular member including a base end portion and a tip end portion in this order in the predetermined axial direction, an annular recess being provided in an inner peripheral surface of the base end portion;
a lens disposed in an inner bore formed by the tip portion; and
a ring member elastically deformable in a radial direction and held in the recess, wherein,
an annular groove portion disposed to face the recess when the tip portion is received in the receiving portion is provided on an outer peripheral surface of the tip portion,
an annular groove portion disposed to face the recessed portion is provided on an outer peripheral surface of the tip portion,
the recess has a size in which the ring member can retreat,
the ring member is accommodated in the recessed portion in a state of being in contact with the outer peripheral surface of the distal end portion, and faces the groove portion along the predetermined axial direction in a state of facing the groove portion to the recessed portion.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004164976 | 2004-06-02 | ||
| JP2004164976A JP3817560B2 (en) | 2004-06-02 | 2004-06-02 | Lens holder, light guide device, and light irradiation device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1704645A true CN1704645A (en) | 2005-12-07 |
| CN100549744C CN100549744C (en) | 2009-10-14 |
Family
ID=35498185
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100735511A Expired - Fee Related CN100549744C (en) | 2004-06-02 | 2005-06-02 | Lens mount, guiding device and light irradiation device |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP3817560B2 (en) |
| KR (1) | KR101050933B1 (en) |
| CN (1) | CN100549744C (en) |
| TW (1) | TW200604469A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102590954A (en) * | 2012-02-29 | 2012-07-18 | 中航光电科技股份有限公司 | Optical connector with detachable casing assembly |
| TWI487962B (en) * | 2011-01-18 | 2015-06-11 | Hon Hai Prec Ind Co Ltd | Waveguide with lens and method of making the same |
| CN113467015A (en) * | 2021-08-03 | 2021-10-01 | 新疆师范大学 | Center calibrating device of laser coupling platform |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008087593A2 (en) * | 2007-01-19 | 2008-07-24 | Philips Intellectual Property & Standards Gmbh | Illumination device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10260343A (en) | 1997-03-18 | 1998-09-29 | Olympus Optical Co Ltd | Replacing mechanism for optical lens barrel |
| KR200327177Y1 (en) * | 1998-06-15 | 2003-12-31 | 삼성테크윈 주식회사 | Binocular diopter adjustment |
-
2004
- 2004-06-02 JP JP2004164976A patent/JP3817560B2/en not_active Expired - Fee Related
-
2005
- 2005-05-26 KR KR1020050044653A patent/KR101050933B1/en active IP Right Grant
- 2005-06-01 TW TW094117950A patent/TW200604469A/en not_active IP Right Cessation
- 2005-06-02 CN CNB2005100735511A patent/CN100549744C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI487962B (en) * | 2011-01-18 | 2015-06-11 | Hon Hai Prec Ind Co Ltd | Waveguide with lens and method of making the same |
| CN102590954A (en) * | 2012-02-29 | 2012-07-18 | 中航光电科技股份有限公司 | Optical connector with detachable casing assembly |
| CN102590954B (en) * | 2012-02-29 | 2015-04-29 | 中航光电科技股份有限公司 | Optical connector with detachable casing assembly |
| CN113467015A (en) * | 2021-08-03 | 2021-10-01 | 新疆师范大学 | Center calibrating device of laser coupling platform |
Also Published As
| Publication number | Publication date |
|---|---|
| TW200604469A (en) | 2006-02-01 |
| JP2005345739A (en) | 2005-12-15 |
| TWI342379B (en) | 2011-05-21 |
| KR101050933B1 (en) | 2011-07-20 |
| KR20060046203A (en) | 2006-05-17 |
| CN100549744C (en) | 2009-10-14 |
| JP3817560B2 (en) | 2006-09-06 |
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