CN101634427B - Light guide body and linear light source device - Google Patents
Light guide body and linear light source device Download PDFInfo
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- CN101634427B CN101634427B CN2008101443389A CN200810144338A CN101634427B CN 101634427 B CN101634427 B CN 101634427B CN 2008101443389 A CN2008101443389 A CN 2008101443389A CN 200810144338 A CN200810144338 A CN 200810144338A CN 101634427 B CN101634427 B CN 101634427B
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Abstract
The invention provides a light guide body and a linear light source device which can radiate light to ensure that black stripes do not appear on the reading image, even under the condition that the reading object has thickness and level difference. The invention is characterized in that the light guide body is in a shape of rod; the end part of one side of the axial direction is a light taken-in part; a rolling planter which extends along the axial direction is arranged at the side face of the light guide body; the rolling planter is provided with a plurality of groove parts; the side face of the light taken-in part side of the groove part is a reflecting surface; and the reflecting surface of at least one groove part in the groove parts is composed of a primary reflecting surface and a secondary reflecting surface.
Description
Technical field
The present invention relates in facsimile machine, duplicator, image reading apparatus, barcode reader etc. the illumination light source of the image read-out that uses or in the use of liquid crystal panel the edge light backlight of LGP with employed light conductor and linear light source device in the light source etc.
Background technology
In recent years, in the image read-out of individual facsimile machine etc., along with the power of light emitting diode (below, be called LED) improves and as the high sensitivityization of the CCD type sensor of photo detector, small-sized and LED low consumption electric power is used as the light source that reads light supply apparatus gradually.As everyone knows, having such LED is purpose as the existing linear light source device of light source to reduce the light source number and to obtain uniform illumination intensity, is to make from the light of light source radiation to incide light conductor and along the device of the structure of desirable direction leaded light.
Fig. 8 illustrates as existing linear light source device to open the figure of the structure of disclosed linear light source device in the flat 9-163080 communique (Japan) spy.
Linear light source device constitutes possesses the light conductor 1 that comprises transparent resin etc., the light source 2 that comprises LED.Light conductor 1 is provided with light at an axial end and is taken into portion 3, has formed the even surface 4 of reflectance coating other end setting.Light source 2 is configured to be taken into portion's 3 face-offs with light.In addition, the annular knurl groove 5 that extends vertically is set on light conductor 1 and the outer peripheral face direction of illumination opposition side.Annular knurl groove 5 is the isosceles triangle shape for the grooving direction with axial quadrature, section vertically.
The emergent light of light source 2 is taken into the inside that light conductor 1 is incided in portion 3 from light, and interreflection in light conductor 1 in reflecting surface 6 reflections of annular knurl groove 5, penetrates from light conductor 1 with the angle of stipulating.
In the emergent light of light source 2, the big light α 1 of incidence angle that is taken into portion 3 with respect to light is approaching reflecting surface 6 reflections (light α 2) that light is taken into the annular knurl groove 5 of portion 3.Owing to be taken into the incidence angle little (light α 2) of the big light α 1 of the incidence angle of portion 3 with respect to light, therefore penetrate (light α 3) from light conductor 1 with the shooting angle that approaches vertical (how much being partial to even surface 4 directions) with respect to the reflecting surface 6 of annular knurl groove 5.
On the other hand, in the emergent light of light source 2, be taken into the axial advancement of the little light β 1 of the incidence angle of portion 3 along light conductor 1 with respect to light, be taken into portion 3 away from light, near reflecting surface 6 reflections (light β 2) of the annular knurl groove 5 of even surface 4.Because be taken into the incidence angle big (light β 2) of the little light β 1 of the incidence angle of portion 3 with respect to the reflecting surface 6 of annular knurl groove 5 with respect to light, therefore the angle with deflection even surface 4 directions penetrates (light β 3) from light conductor 1.
Patent documentation 1:(Japan) spy opens flat 9-163080 communique.
But owing to penetrate the light β 3 of the angle with deflection even surface 4 directions, therefore there is the situation that produces black streaking in the reading images in the linear light source device shown in Fig. 8.Fig. 9 is the fragmentary cross-sectional view that shows the image read-out of reading object 42 and light for shadow 44 is described.
In image read-out, with the light-emitting face 9 of linear light source device the placed side 41 that comprises the photopermeability member is set relatively, be placed on the placed side 41 and use recording the reading object 42 of wanting the image that reads.The light that penetrates from the light-emitting face 9 of light conductor 1 is to placed side 41 irradiations, and the projection image that detects reading object 42 is as reading images.
At the object that books etc. is had thickness during, between the photoirradiated surface of reading object 42 and original copy lid 43, produce thickness as reading object 42.Because reading object 42 is light tight, so the light β 3 of the end of irradiation reading object 42
aDo not shine original copy lid 43.The light β 3 of end from irradiation reading object 42
aVertically a little with departing from the irradiation light β 3
bIrradiation original copy lid 43, but because angle is arranged, so shine vertically from the end of reading object 42 with departing from.Therefore, at light β 3
aWith light β 3
bBetween have not by light-struck shadow 44, show as black streaking in the reading images.
Take place when in addition, same situation also has jumps such as broken line on reading object 42.
Summary of the invention
The present invention is point in view of the above-mentioned problems, and purpose is to provide a kind of light conductor and linear light source device, even have in reading object under the situation of thickness or jump, also radiating light makes and do not produce black streaking on the reading images.
The application's the 1st invention is a kind of light conductor, it is characterized in that, this light conductor is bar-shaped, an axial side's end is that light is taken into portion, the side is formed with the annular knurl groove that extends vertically, above-mentioned annular knurl groove has a plurality of slot parts, and the side that the light of above-mentioned slot part is taken into portion's side is a reflecting surface, and the reflecting surface of at least 1 slot part is made of 1 secondary reflector and 2 secondary reflectors in the above-mentioned slot part.
In addition, the application's the 2nd invention in the 1st invention, is characterized in that, be formed with above-mentioned 2 secondary reflectors at the axial end portion of above-mentioned 1 secondary reflector, and the angle of inclination of above-mentioned 2 secondary reflectors is greater than the angle of inclination of above-mentioned 1 secondary reflector.
In addition, the application's the 3rd invention, in the 1st invention, it is characterized in that, above-mentioned slot part is made of above-mentioned reflecting surface, tabular surface and transparent surface, the above-mentioned transparent surface of above-mentioned slot part is made of 1 transparent surface and 2 transparent surfaces, and wherein above-mentioned slot part has the above-mentioned reflecting surface that constitutes above-mentioned 1 secondary reflector and above-mentioned 2 secondary reflectors.
In addition, the application's the 4th invention in the 3rd invention, is characterized in that, be formed with above-mentioned 1 transparent surface at the axial end portion of above-mentioned 2 transparent surfaces, and the angle of inclination of above-mentioned 2 transparent surfaces is greater than the angle of inclination of above-mentioned 1 transparent surface.
In addition, the application's the 5th invention in the 1st invention, is characterized in that above-mentioned slot part is made of above-mentioned reflecting surface, tabular surface and transparent surface, and above-mentioned tabular surface is from axially tilting to the turning anticlockwise direction.
In addition, the application's the 6th invention is characterized in that, has the light conductor of record in the 1st～5 invention and the light source that is oppositely arranged with the above-mentioned light portion of being taken into of above-mentioned light conductor.
According to light conductor that the present invention relates to and linear light source device, by constitute the reflecting surface of the slot part of annular knurl groove by 1 secondary reflector and 2 secondary reflectors, can penetrate at the light that axially has 2 different angle compositions to reading object from linear light source device, even therefore have under the situation of thickness or jump in reading object, cover at original copy and also not produce shadow, do not occur black streaking on the reading images.
Description of drawings
Fig. 1 is the stereogram that the structure of linear light source device of the present invention is shown.
Fig. 2 is the amplification profile of linear light source device of the present invention.
Fig. 3 is the perspective view that radially cuts off light conductor of the present invention.
Fig. 4 is the amplification profile of each slot part of the annular knurl groove of light conductor of the present invention.
Fig. 5 illustrates the fragmentary cross-sectional view of image read-out that light shines the state of reading object.
Fig. 6 is the amplification profile of each slot part of the annular knurl groove of light conductor of the present invention.
Fig. 7 is the part amplification profile of slot part of the annular knurl groove of light conductor of the present invention.
Fig. 8 is the profile that the structure of existing linear light source device is shown.
Fig. 9 illustrates the fragmentary cross-sectional view of image read-out that light shines the state of reading object.
Symbol description
1 light conductor
2 light sources
3 light are taken into portion
4 even surfaces
5 annular knurl grooves
6 reflectings surface
7 slot parts
8 tabular surfaces
9 light-emitting faces
10 transparent surfaces
11 1 secondary reflectors
12 2 secondary reflectors
41 placed sides
42 reading object
43 original copys lid
The specific embodiment
The 1st embodiment of the present invention is described.Fig. 1 is the stereogram that the structure of linear light source device of the present invention is shown.
Linear light source device constitutes possesses the light conductor 1 that comprises transparent resin etc., the light source 2 that comprises LED.Light conductor 1 is columned member, is provided with light at an axial end and is taken into portion 3, and the other end is an even surface 4.The annular knurl groove 5 that extends vertically is being set on the outer peripheral face as the side of light conductor 1, and the position relative with annular knurl groove 5 is light-emitting face 9.Annular knurl groove 5 is formed with the slot part 7 of the axial quadrature of a plurality of grooving directions and light conductor 1.
The luminous intensity distribution distribution that the light that penetrates from light source 2 has lambert (lambertian) type is to light conductor 1 irradiation.Under the situation that incides high refraction matter media, according to Snell law, refraction takes place becomes the little light of angle from the emergent light of light source 2.For example, from the emergent light of light source 2 when inciding the light conductor 1 of refractive index n=1.49 by air, as long as the plane of incidence is a vertical plane with respect to the central shaft of light conductor 1, even then incident angle is 89 ° a light, also become tilt 42 ° light of axle with respect to light conductor 1, that is, be 48 ° with respect to side (outer peripheral face) incident angle of light conductor 1, surpass critical angle.Therefore, if the side of light conductor is minute surface and is parallel with respect to axle that the light that then incides light conductor 1 is just all by total reflection and harmless lost territory leaded light.
Fig. 2 is the amplification profile with linear light source device of the present invention X cut-out vertically.
From the light of light source 2 incidents through the reflection of light conductor 1 inwall, arrive annular knurl groove 5, surpass under the situation of critical angle with respect to the incidence angle of reflecting surface 6, total reflection takes place advance to light-emitting face 9, inject to the outside from light conductor 1.The big light A1 of incidence angle that is taken into portion 3 with respect to light is approaching reflecting surface 6 reflections that light is taken into the annular knurl groove 5 of portion 3.Because incident light A1 is little with respect to the incidence angle of the reflecting surface 6 of annular knurl groove 5, therefore to respect to the direction of light-emitting face 9 approximate vertical by total reflection.Be taken into the little light B1 of the incidence angle of portion 3 with respect to light and advance along the axial X of light conductor 1, be taken into portion 3 away from light, near reflecting surface 6 reflections of the annular knurl groove 5 of even surface 4.Because incident light B1 is big with respect to the incidence angle of the reflecting surface 6 of annular knurl groove 5, therefore be reflected from the angle that light is taken into the axial X that portion 3 advances to even surface 4 with deflection.
Fig. 3 is the perspective view that light conductor 1 of the present invention is cut off at Y radially along line segment A-A ' shown in Figure 2.Solid line illustrates the shape of the light conductor 1 on the line segment A-A ', is shown in dotted line the slot part 7 of annular knurl groove 5.
The section radially of light conductor 1 is not complete circle, and in a part line part is being set.If integral body is seen light conductor 1, then the horizontal plane that extends vertically is being set at outer peripheral face.Annular knurl groove 5 is arranged on this horizontal plane.With horizontal plane is because can easily carry out the high groove processing of precision.
Fig. 4 is the amplification profile with each slot part 7 of the annular knurl groove 5 X cut-out vertically of light conductor of the present invention.
The side that the light of each slot part 7 is taken into portion's 3 sides is a reflecting surface 6, and the side of even surface 4 sides is a transparent surface 10.Reflecting surface 6 is made of 1 secondary reflector 11 and 2 secondary reflectors 12, is formed with 2 secondary reflectors 12 in the axial X end of 1 secondary reflector 11.Slot part 7 is being taken into portion 3 on the axial X that even surface 4 advances from light, be constituted as: be formed with and charge into radially 1 secondary reflector 11 of Y, then 1 secondary reflector 11 is formed with 2 secondary reflectors 12, then 2 secondary reflectors 12 are formed with tabular surface 8, and then tabular surface 8 is formed with to the outstanding transparent surface 10 of opposite direction of Y radially.That is, slot part 7 is to form by the order of 1 secondary reflector, 11,2 secondary reflectors 12, tabular surface 8, transparent surface 10 towards axial X.
θ
1The angle when counter clockwise direction is rotated from axial X to 1 secondary reflector 11 is shown, θ
2The angle when clockwise direction rotates from 180 ° of opposite directions of axial X to transparent surface 10 is shown, θ
3The angle when counter clockwise direction is rotated from axial X to 2 secondary reflectors 12 is shown.
Total reflection and colleague take place in light conductor 1 in order to make from the light of light source 2 is over half at least, need make from light source 2 with the light of 45 ° of ejaculations, promptly light conductor 1 in respect to the light generation total reflection that spool has 28 ° inclination of light conductor 1.For this reason, the tilt angle theta of 1 secondary reflector 11
1Near being taken into portion 3, light forms 20 °.In addition, the tilt angle theta of transparent surface 10
2In order not block the light of inclination, form more than 28 ° with 28 °.
The tilt angle theta of 2 secondary reflectors 12
3Become tilt angle theta greater than 1 secondary reflector 11
1Therefore, occur in the situation that the light of 1 secondary reflector 11 reflection reflects at 2 secondary reflectors 12 again.
Incide the light A2 that is reflected into angle away from the light A1 of 1 secondary reflector 11 of the position of 2 secondary reflectors 12 with the axial X of deflection.On the other hand, the light B1 that incides near 1 secondary reflector 11 2 secondary reflectors 12 reflect once again at 2 secondary reflectors 12, and is reflected into the light B2 with the reciprocal angle of being partial to axial X.If tilt angle theta
3Be 75 °～90 °, then emergent light B2 advances with preferred direction.
By constituting reflecting surface 6, even inner importing is advanced along 1 direction from the light source to the light conductor light A1, B1 also can be reflected as light A2, the B2 that advances along 2 directions at reflecting surface 6 by 1 secondary reflector 11 and 2 secondary reflectors 12.In order suitably to divide the light quantity of luminous intensity distribution A2 and light B2, take the circumstances into consideration adjustment, but preferably constitute the height of 2 such secondary reflectors 12, make to have 15 °～run into 2 secondary reflectors 12 about half of the light of 20 ° inclination.
Fig. 5 illustrates the fragmentary cross-sectional view of image read-out that light A2, B2 shine the state of reading object 42.
The light A2, the B2 that are reflected at reflecting surface shown in Figure 46 see through the outside that light-emitting face 9 injects to light conductor 1, shine reading object 42 shown in Figure 5.In image read-out, with the light-emitting face 9 of linear light source device the placed side 41 that comprises the photopermeability member is set relatively, be placed on the placed side 41 and use recording the reading object 42 of wanting the image that reads.The light that penetrates from the light-emitting face 9 of light conductor 1 is to placed side 41 irradiations.Image read-out will record the reading object 42 of wanting the image that reads and be placed on the placed side 41 and use, and the projection image that detects the reading object 42 that is placed on the placed side 41 is as reading images.
If the object that books etc. are had thickness is as reading object 42, then between the photoirradiated surface of reading object 42 and original copy lid 43, produce thickness.Because reading object 42 is light tight, therefore has the light A2 of the angle composition of being partial to axial X if original copy lid 43 is not then shone in the end of irradiation reading object 42.But, owing to can being radiated at original copy, the light B2 with the reciprocal angle composition of being partial to axial X covers the position that 43 glazing A2 can not shine, therefore can not take place not by light-struck shadow.
Equally also be applicable to the situation that jumps such as broken line are arranged on the reading object 42.
Therefore, by constitute the reflecting surface 6 of the slot part 7 of annular knurl groove 5 by 1 secondary reflector 11 and 2 secondary reflectors 12, can penetrate the light that has 2 different angle compositions at axial X to reading object 42 from linear light source device, even therefore have under the situation of thickness or jump in reading object 42, on original copy lid 43, do not produce shadow yet, do not occur black streaking on the reading images.
The 2nd embodiment of the present invention is described.Fig. 6 is the amplification profile of each slot part 7 of the annular knurl groove 5 of light conductor of the present invention.
The 2nd embodiment is in the linear light source device of the 1st embodiment, the mode of the shape of the slot part 7 of change annular knurl groove 5.Alternately be formed with slot part 7a and slot part 7b, wherein slot part 7a is formed with the reflecting surface 6 that comprises a face, and slot part 7b is formed with the reflecting surface 6 that comprises 1 secondary reflector 11 and 2 secondary reflectors 12.Slot part 7b is provided with and charges into the radially groove of the rectangle of Y from the tabular surface 8 of slot part 7a.2 secondary reflectors 12 that form on slot part 7b are compared 2 secondary reflectors 12 of the 1st embodiment, and the length of charging into Y radially becomes big, and it is big that its surface area also becomes.In addition, the transparent surface 10 that forms on slot part 7b also is made of 1 transparent surface 13 and 2 transparent surfaces 14.The tilt angle theta of 1 transparent surface 13
4Illustrate from the angle when clockwise direction rotates of opposite direction to the 1 time transparent surface 13 of axial X, with the tilt angle theta of the transparent surface 10 of slot part 7a
2Roughly the same.2 transparent surfaces 14 and 2 secondary reflectors 12 are oppositely arranged.The tilt angle theta of 2 transparent surfaces 14
5Illustrate from the angle when clockwise direction rotates of opposite direction to the 2 time transparent surface 14 of axial X, greater than the tilt angle theta of 1 transparent surface 13
4
Slot part 7a is constituted as on axial X: be formed with and charge into the radially reflecting surface 6 of Y, then reflecting surface 6 is formed with tabular surface 8, and then tabular surface 8 is formed with to the outstanding transparent surface 10 of opposite direction of Y radially.That is, slot part 7a forms towards the order that axial X presses reflecting surface 6, tabular surface 8, transparent surface 10.
On the other hand, slot part 7b is on axial X, be constituted as: be formed with and charge into radially 1 secondary reflector 11 of Y, then 1 secondary reflector 11 is formed with 2 secondary reflectors 12, then 2 secondary reflectors 12 are formed with tabular surface 8, then tabular surface 8 is formed with to 2 times outstanding transparent surfaces 14 of opposite direction of Y radially, and then 2 transparent surfaces 14 are formed with transparent surface 13 1 time.That is, slot part 7b forms by the order of 1 secondary reflector, 11,2 secondary reflectors 12,14,1 transparent surface 13 of 8,2 transparent surfaces of tabular surface towards axial X.
The light A1 that incides the reflecting surface 6 of slot part 7a is reflected into the light A2 of the angle with the axial X of deflection.On the other hand, the light B1 of 1 secondary reflector 11 that incides slot part 7b charges into length (highly) by 2 secondary reflectors 12 that extend to Y radially, irrelevant with incident angle or incoming position to 1 secondary reflector 11, roughly all can be by secondary reflection again, and be reflected as the light B2 of reciprocal angle with the axial X of deflection.Although light A1 incides the height of reflecting surface 6 and height that light B1 incides 1 secondary reflector 11 is roughly the same, the light A2, the B2 that are reflected advance to different directions.
In addition, the light C1 that shines slot part 7b from the position that is higher than A1, B1 incides 2 secondary reflectors 12.Because the angle of inclination of 2 secondary reflectors 12 is big, thus the incident angle of light C1 less than critical angle, light C1 sees through 2 secondary reflectors 12.The light that sees through of light C1 incides light conductor inside once more from 2 transparent surfaces 14, becomes the light C2 of X importing vertically.
Like this, by alternately forming slot part 7a and slot part 7b, wherein slot part 7a is formed with the reflecting surface 6 that is made of a face, slot part 7b is formed with the reflecting surface 6 that is made of 1 secondary reflector 11 and 2 secondary reflectors 12, even import light A1, the B1 that advances along a direction to light conductor inside from light source, but also can to reading object 42 penetrate light A2 that the reflecting surface 6 at slot part 7a is reflected and the light B2 that is reflected at 1 secondary reflector 11 and 2 secondary reflectors 12 of slot part 7b such, have light A2, the B2 of the angle composition of 2 different directions at axial X.In addition, also incide light conductor inside once more, become the light C2 of X importing vertically, therefore can effectively utilize light because see through the light C1 of 2 secondary reflectors 12.
And, the interval that slot part 7a and slot part 7b are formed also can not necessarily must replace, wherein slot part 7a is formed with the reflecting surface 6 that is made of a face, slot part 7b is formed with the reflecting surface 6 that is made of 1 secondary reflector 11 and 2 secondary reflectors 12, also can be in the place that a plurality of slot part 7a that are formed with the reflecting surface 6 that is made of a face are formed, only insert the slot part 7b that is formed with the reflecting surface 6 that constitutes by 1 secondary reflector 11 and 2 secondary reflectors 12 of right quantity, constitute annular knurl groove 5.In addition, also can be opposite.
In order to prevent that original copy from covering the shadow that produces in the end of reading object, also can be on the slot part 7 of the annular knurl groove 5 of the part of the even surface side of the axial X of light conductor, form slot part 7b, this slot part 7b is formed with the reflecting surface 6 that is made of 1 secondary reflector 11 and 2 secondary reflectors 12.
The 3rd embodiment of the present invention is described.Fig. 7 is the part amplification profile of slot part 7 of the annular knurl groove 5 of light conductor of the present invention.Fig. 7 (a) illustrates from axial X to counterclockwise tilting and the situation of formation tabular surface 8 slot part 7a shown in Figure 6.Fig. 7 (b) is to slot part 7b shown in Figure 6, the angle of inclination that makes 2 secondary reflectors 12 and 2 transparent surfaces 14 is shown smaller or equal to 90 ° situation.
Shown in Fig. 7 (a), the 3rd embodiment is in the linear light source device of the 2nd embodiment, forms the mode of the tabular surface 8 of slot part 7a to inclination counterclockwise from axial X.Tabular surface 8 with the contact of reflecting surface 6 as fulcrum, form from axial X to the state that counterclockwise rotates a little.When light A1 incides tabular surface 8, compare the situation that tabular surface 8 is parallel to axial X, incident angle θ
aDiminish.Light A1 at tabular surface 8 with corresponding to incident angle θ
aAngle carry out total reflection and become light A2.The angle θ of light A2 and axial X
bCompare the situation that tabular surface 8 is parallel to axial X and become big, can make the angle composition of the radially Y of light A2 become big.
Shown in Fig. 7 (b), the 3rd embodiment is in the linear light source device of the 2nd embodiment, and the angle of inclination that makes 2 secondary reflectors 12 of slot part 7b and 2 transparent surfaces 14 is smaller or equal to 90 ° mode.If make the tilt angle theta of 2 secondary reflectors 12
3Smaller or equal to 90 °, then when light B1 incides 2 secondary reflectors 12 in 11 reflections of 1 secondary reflector, with the tilt angle theta of 2 secondary reflectors 12
3The situation that is 90 ° is compared, with respect to the incident angle θ of 2 secondary reflectors 12
dBecome big.Because the shooting angle of the emergent light B2 of 2 secondary reflectors 12 is also corresponding to incident angle θ
dSo, with the angle θ of Y radially
cDiminish.Because light B2 and tilt angle theta
3The situation that is 90 ° is compared, and axially the reciprocal angle composition of X diminishes, and radially the angle composition of Y becomes big, so advance along the approaching radially direction of Y.
Claims (5)
1. a light conductor is characterized in that, this light conductor is bar-shaped, and an axial side's end is that light is taken into portion, and the side is formed with the annular knurl groove that extends vertically,
Above-mentioned annular knurl groove has a plurality of slot parts, and the side that the light of above-mentioned slot part is taken into portion's side is a reflecting surface, and the reflecting surface of at least 1 slot part is made of 1 secondary reflector and 2 secondary reflectors in the above-mentioned slot part,
Axial end portion at above-mentioned 1 secondary reflector is formed with above-mentioned 2 secondary reflectors, and the angle of inclination of above-mentioned 2 secondary reflectors is greater than the angle of inclination of above-mentioned 1 secondary reflector.
2. according to the light conductor of claim 1 record, it is characterized in that,
Above-mentioned slot part is made of above-mentioned reflecting surface, tabular surface and transparent surface, and the above-mentioned transparent surface of above-mentioned slot part is made of 1 transparent surface and 2 transparent surfaces, and wherein above-mentioned slot part has the above-mentioned reflecting surface that is made of above-mentioned 1 secondary reflector and above-mentioned 2 secondary reflectors.
3. according to the light conductor of claim 2 record, it is characterized in that,
Axial end portion at above-mentioned 2 transparent surfaces is formed with above-mentioned 1 transparent surface, and the angle of inclination of above-mentioned 2 transparent surfaces is greater than the angle of inclination of above-mentioned 1 transparent surface.
4. according to the light conductor of claim 1 record, it is characterized in that,
Above-mentioned slot part is made of above-mentioned reflecting surface, tabular surface and transparent surface, and above-mentioned tabular surface is from axially tilting to the turning anticlockwise direction.
5. a linear light source device is characterized in that,
Have the light conductor of each record in claim 1～4 and the light source that is oppositely arranged with the above-mentioned light portion of being taken into of above-mentioned light conductor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101443389A CN101634427B (en) | 2008-07-25 | 2008-07-25 | Light guide body and linear light source device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101443389A CN101634427B (en) | 2008-07-25 | 2008-07-25 | Light guide body and linear light source device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101634427A CN101634427A (en) | 2010-01-27 |
| CN101634427B true CN101634427B (en) | 2011-12-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101443389A Active CN101634427B (en) | 2008-07-25 | 2008-07-25 | Light guide body and linear light source device |
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| CN (1) | CN101634427B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105141802A (en) * | 2015-09-16 | 2015-12-09 | 威海华菱光电股份有限公司 | Ultraviolet light transmission light source and image reading device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1104536A1 (en) * | 1998-08-20 | 2001-06-06 | Physical Optics Corporation | Fiber optic luminaire |
| JP2001202815A (en) * | 2000-01-21 | 2001-07-27 | Citizen Electronics Co Ltd | Linear light source unit |
| CN2577303Y (en) * | 2002-11-01 | 2003-10-01 | 力捷电脑(中国)有限公司 | LED light pipe light-source apparatus for scanning |
| CN1664669A (en) * | 2004-03-04 | 2005-09-07 | 日本电产科宝株式会社 | Light-guide plate, surface light emitting device using light-guide plate and method of manufacturing light-guide plate |
| EP1596175A1 (en) * | 2004-05-11 | 2005-11-16 | Minebea Co. Ltd. | Torque measuring device for rotating body having light conductive member provided with optical path converting means |
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2008
- 2008-07-25 CN CN2008101443389A patent/CN101634427B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1104536A1 (en) * | 1998-08-20 | 2001-06-06 | Physical Optics Corporation | Fiber optic luminaire |
| JP2001202815A (en) * | 2000-01-21 | 2001-07-27 | Citizen Electronics Co Ltd | Linear light source unit |
| CN2577303Y (en) * | 2002-11-01 | 2003-10-01 | 力捷电脑(中国)有限公司 | LED light pipe light-source apparatus for scanning |
| CN1664669A (en) * | 2004-03-04 | 2005-09-07 | 日本电产科宝株式会社 | Light-guide plate, surface light emitting device using light-guide plate and method of manufacturing light-guide plate |
| EP1596175A1 (en) * | 2004-05-11 | 2005-11-16 | Minebea Co. Ltd. | Torque measuring device for rotating body having light conductive member provided with optical path converting means |
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|---|---|
| CN101634427A (en) | 2010-01-27 |
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