WO2009102096A1

WO2009102096A1 - Laser pointer

Info

Publication number: WO2009102096A1
Application number: PCT/KR2008/003832
Authority: WO
Inventors: Yu Chin Hahn
Original assignee: Rmi Korea Corp.
Priority date: 2008-02-12
Filing date: 2008-06-30
Publication date: 2009-08-20

Abstract

The present invention relates to a laser pointer in which a red laser diode or a green laser diode is operated by means of manipulation of a switch to create a red or green-colored point so that a user can express the red or green-colored point to be suited for his or her color preference, in which the red laser diode and the green laser diode is simultaneously operated by means ma¬ nipulation of the switch to allow beams of laser light having red and green colors to be superposed on each other so that a color of the imaged point can be expressed as a yellow-based color, in which the user can selectively express a red point color, a green point color or a yellow- based point color to be suited for his or her taste and color preference to thereby result in diversification of color.

Description

Description LASER POINTER

Technical Field

[1] The present invention relates to a laser pointer in which a red laser diode or a green laser diode is operated by means of manipulation of a switch to create a red or green- colored point so that a user can express the red or green-colored point to be suited for his or her color preference, in which the red laser diode and the green laser diode is simultaneously operated by means manipulation of the switch to allow beams of laser light having red and green colors to be superposed on each other so that a color of the imaged point can be expressed as a yellow-based color, in which the user can selectively express a red point color, a green point color or a yellow-based point color to be suited for his or her taste and color preference to thereby result in diversification of color, and in which the brightness of the red laser diode and the green laser diode can be adjusted under the control of a control section so as to create a point of light beam having various colors such as orange, yellow and yellowish green. Background Art

[2] In general, a laser pointer is referred to as a laser beam projecting indicator (mostly formed in the shape of writing instruments) designed to project a point of a laser light beam to highlight items of interest during a presentation. The laser pointer includes a printed circuit board (PCB), a laser diode, lens and the like built therein, which are adapted to project a laser light beam. The laser is also referred to as a laser indicator rod that is configured to project a point of the laser light beam in a straight line when power is supplied to the laser pointer and an ON/OFF switch is opened/closed, so that the laser pointer easily and readily points to the contents of the seminar materials and the like positioned on a monitor, a portable personal computer, a black board or the like in a conference room

[3] In line with the stream of the times, modern people personally carry an elongated laser pointer of a writing instrument shape along with cellular phones so as to utilize it on whichever monitor a user wants to use irrespective of places without having an elongated laser pointer equipped in the conference room and the like at ordinary times. Also, many people use the laser-pointer to maximize the visual effects through pre viously prepared materials during the public lecture or business report.

[4] FIG. 1 is a cross-sectional view showing a conventional laser pointer according to the prior art.

[5] As shown in FIG. 1, a laser pointer 100 includes a control section 101 for controlling the overall operation of an inner system of the laser pointer, a light source section 102 connected to a connector for emitting a laser light beam, a lens 103 for condensing the laser beam emitted from the light source section 102, and a hole section 104 for allowing the laser beam condensed by the lens to pass therethrough to create a point of the laser beam. Here, the laser light beam passing through the laser beam passageway 104 proceeds straight due to its intrinsic directivity and then collides against a target object so as to form an image in the shape of a point on the target object.

[6] The laser pointer 100 shown in FIG. 1 emits a laser light beam through the light source section 102 under the control of the control section 101. Here, the control section 101 is electrically connected inside the laser pointer 100 so as to be applied with an operating signal through manipulation of a separate ON/OFF switch (not shown) installed at the outside of the laser pointer 100 to control the light source section 102 to emit a laser light beam.

[7] The lens 103 condenses the laser light beam emitted from the light source section

102 to diverge the condensed laser light beam to the hole section 104. Then, the laser light beam condensed by the lens 103 is emitted as a laser light beam with directivity toward the outside while passing through the hole section 104 to thereby form a circular point on the target object. In this case, the laser pointer 100 is provided to emit a red light beam, and may be configured such that a distance between the light source section 102 and the lens 103 is adjusted or a distance between the lens 103 and the hole section 104 is adjusted to control the size, shape, brightness or the like of the point image.

[8] However, such a conventional laser pointer has a limitation of creating only one color according to an output wavelength of the laser light source 102 that emits the light beam, and has a shortcoming in that a viewer can suffer from eye fatigue if he or she watches it for a long time since it emits only a red light beam.

[9] Therefore, there is an urgent need for the development of a novel laser pointer in which a red laser diode or a green laser diode is operated by means of manipulation of a switch to create a red or green-colored point so that a user can express the red or green-colored point to be suited for his or her color preference, in which the red laser diode and the green laser diode is simultaneously operated by means manipulation of the switch to allow beams of laser light having red and green colors to be superposed on each other so that a color of the imaged point can be expressed as a yellow-based color, in which the user can selectively express a red point color, a green point color or a yellow-based point color to be suited for his or her taste and color preference to thereby result in diversification of color Disclosure of Invention Technical Problem [10] Accordingly, the present invention has been made to overcome the above-mentioned problems occurring in the prior art, and it is an object of the present invention to provide a laser pointer in which a red laser diode or a green laser diode is operated by means of manipulation of a switch to create a red or green-colored point so that a user can express the red or green-colored point to be suited for his or her color preference.

[11] Another object of the present invention is to provide a laser pointer in which the red laser diode and the green laser diode is simultaneously operated by means manipulation of the switch to allow beams of laser light having red and green colors to be superposed on each other so that a color of the imaged point can be expressed as a yellow-based color.

[12] Yet another object of the present invention is to provide a laser pointer in which the user can selectively express a red point color, a green point color or a yellow-based point color to be suited for his or her taste and color preference to thereby result in diversification of color.

[13] Still another object of the present invention is to provide a laser pointer in which the brightness of the red laser diode and the green laser diode can be adjusted under the control of a control section so as to create a point having various colors such as orange, yellow and yellowish green. Technical Solution

[14] To accomplish the above objects, according to one aspect of the present invention, there is provided a laser pointer comprising: a casing having a lower main body and a cover mounted with a switch at the outside thereof; a control section electrically connected inside the laser pointer so as to be applied with an operating signal through manipulation of the switch to control the overall operation of an inner system of the laser pointer; a light source section consisting of a red laser diode and a green laser diode and adapted to emit a laser light beam in response to a control signal from the control section; a crystal element for changing the wavelength of a green laser light beam emitted from the green laser diode and amplifying the laser light beam; a plurality of first condenser lenses for condensing the green laser light beam amplified by the crystal element and a red laser light beam emitted from the red laser diode, respectively; a plurality of reflecting mirrors for adjusting the traveling paths of the green and red laser light beams passing through the plurality of condenser lenses; a second condenser lens for condensing a resultant laser light beam reflected by and emitted from the plurality of reflecting mirrors; and a hole section for allowing the resultant laser beam condensed by the second condenser lens to pass therethrough to create a point of the laser beam.

[15] In the present invention, the crystal element includes an ND:YV04 crystal element for allowing the green laser light beam emitted from the green laser diode to be converted into a light beam having a wavelength of 1064nm while passing therethrough, and a KTP crystal element for allowing the green laser light beam to be amplified into a green laser light beam having a wavelength of 532nm while passing therethrough.

[16] In the present invention, the green laser light beam and the red laser light beam are superposed on each other while being emitted along the same traveling path so as to create a yellow-based color in which the green color and the red color are overlapped with each other.

[17] In the present invention, the control section adjusts the brightness of the red laser diode and the green laser diode so as to create a point of light beam having various colors such as orange, yellow and yellowish green.

[18] In the present invention, the selective manipulation of the switch enables a user to selectively express a red point color, a green point color or a yellow-based point color to be suited for his or her taste and color preference.

Advantageous Effects

[19] According to the laser pointer of the present invention, a red laser diode or a green laser diode is operated by means of manipulation of a switch to create a red or green- colored point so that a user can express the red or green-colored point to be suited for his or her color preference. Also, the red laser diode and the green laser diode is simultaneously operated by means manipulation of the switch to allow beams of laser light having red and green colors to be superposed on each other so that a color of the imaged point can be expressed as a yellow-based color. Further, the user can selectively express a red point color, a green point color or a yellow-based point color to be suited for his or her taste and color preference to thereby result in diversification of color. In addition, the brightness of the red laser diode and the green laser diode can be adjusted under the control of a control section so as to create a point having various colors such as orange, yellow and yellowish green. Brief Description of the Drawings

[20] FIG. 1 is a cross-sectional view showing a conventional laser pointer according to the prior art; and

[21] FIG. 2 is a cross-sectional view showing a laser pointer according to a preferred embodiment of the present invention. Best Mode for Carrying Out the Invention

[22] A preferred embodiment of the present invention will now be described in detail to with reference to the attached drawings. This is merely an exemplary embodiment, and the present invention is not limited thereto. [23] Hereinafter, the preferred embodiments of the invention will be explained in details with reference to the accompanying drawings. In the description, details on well- known techniques and construction may be omitted to avoid unnecessarily obscuring the invention. The words and phrases used herein have been defined in consideration of functions of the invention and may be interpreted differently according to the intentions and customs of users and operators. Thus, their meanings should be interpreted based on the contents of the whole description explaining the present invention entitled laser pointer.

[24] FIG. 2 is a cross-sectional view showing a laser pointer according to a preferred embodiment of the present invention.

[25] As shown in FIG. 2, a laser pointer 200 of the present invention includes: a casing

214 having a lower main body 212 and a cover 213 mounted with a switch 215 at the outside thereof; a control section 210 electrically connected inside the laser pointer 200 so as to be applied with an operating signal through manipulation of the switch 215 to control the overall operation of an inner system of the laser pointer; a light source section consisting of a red laser diode 209 and a green laser diode 202 and adapted to emit a laser light beam in response to a control signal from the control section; crystal elements 203 and 204 for changing the wavelength of a green laser light beam emitted from the green laser diode 202 and amplifying the laser light beam; a plurality of first condenser lenses 205 and 210 for condensing the green laser light beam amplified by the crystal elements 203 and 204 and a red laser light beam emitted from the red laser diode 209, respectively; a plurality of reflecting mirrors 206 and 207 for adjusting the traveling paths of the green and red laser light beams passing through the plurality of condenser lenses 205 and 210; a second condenser lens 208 for condensing a resultant laser light beam reflected by and emitted from the plurality of reflecting mirrors 206 and 207; and a hole section 211 for allowing the resultant laser beam condensed by the second condenser lens 208 to pass therethrough to create a point of the laser beam.

[26] The functions of the main technical means constituting the laser pointer 200 according to a preferred embodiment of the present invention will be described hereinafter.

[27] The casing 214 includes a lower main body 212 and a cover 213 mounted with a switch 215 at the outside thereof.

[28] The control section 201 is electrically connected inside the laser pointer 200 so as to be applied with an operating signal through manipulation of the switch 215 to control the red laser diode 209 and the green laser diode 202 to be operated simultaneously. In this case, the control section 201 can adjust the brightness of the red laser diode 209 and the green laser diode 202 so as to create a point of light beam having various colors such as orange, yellow and yellowish green. [29] The red laser diode 209 and green laser diode 202 emit a red laser light beam and a green laser light beam, respectively, in response to the control signal of the control section 201.

[30] The crystal elements 203 and 204 serve to change the wavelength of a green laser light beam emitted from the green laser diode 202 and amplify the laser light beam. In this case, the emitted green laser light beam is converted into a light beam having a wavelength of 1064nm while passing through the ND:YV04 crystal element 203, and then is amplified into a light beam having a wavelength of 532nm while passing through the KTP crystal element 204.

[31] The first condenser lenses 205 and 210 condense the green laser light beam amplified by the crystal elements 203 and 204 and the red laser light beam emitted from the red laser diode 209, respectively. In this case, the first condenser lenses are required to be provided in plural numbers since they must emit the green laser light beam and the red laser light beam.

[32] The reflecting mirrors 206 and 207 are also required to be provided in plural numbers since they must adjust the traveling paths of the green and red laser light beams passing through the plurality of condenser lenses 205 and 210.

[33] The second condenser lens 208 condenses a resultant laser light beam reflected by and emitted from the plurality of reflecting mirrors 206 and 207. In this case, the green laser light beam and the red laser light beam are superposed on each other which being emitted through the same traveling path in the second condenser lens 208 to thereby express a yellow-based color.

[34] The hole section 211 allows the resultant laser beam condensed by the second condenser lens 208 to pass therethrough to create a point of the laser beam.

[35] As described above, a user can selectively express a red point color, a green point color or a yellow-based point color to be suited for his or her taste and color preference through a selective manipulation of the switch 215.

[36] Now, the process of forming a laser point of a green light beam, a laser point of a red light beam and a laser point of a yellow light beam will be described hereinafter.

[37] First, the process of forming a laser point of the green light beam will be described hereinafter.

[38] The laser pointer 200 emits a green laser light beam having a wavelength of 8O8nm through the green laser diode 202 under the control of the control section 201. At this time, the control section 201 controls the green laser diode 202 to emit the green laser light beam though manipulation of an ON/OFF switch 215 installed on the casing 214 of the laser pointer 200. The green laser light beam emitted from the green laser diode 202 is converted into a light beam having a wavelength of 1064nm while passing through the ND:YV04 crystal element 203, and then is amplified into a green laser light beam having a wavelength of 532nm while passing through the KTP crystal element 2O4.Thereafter, the green laser light beam amplified by the KTP crystal element 204 is condensed by the first condenser lens 205 while passing through the first condenser lens 205, and then is reflected by the reflecting mirrors 206 and 207 reflecting a laser light beam having a wavelength of 532nm along a given traveling path.Then, the laser light beam reflected by the reflecting mirror 207 passes through the second condensing lens 208 and the hole section 211 so as to create a laser point of the green light beam.

[39] Next, the process of forming a laser point of the red light beam will be described hereinafter.

[40] The laser pointer 200 emits a red laser light beam having a wavelength of 635nm through the red laser diode 209 under the control of the control section 201. At this time, the control section 201 controls the red laser diode 209 to emit the red laser light beam though manipulation of the ON/OFF switch 215 installed on the casing 214 of the laser pointer 200. The red laser light beam emitted from the red laser diode 209 is condensed by the first condenser lens 210 while passing through the first condenser lens 210, and then passes through the reflecting mirror 207 allowing a laser light beam having a wavelength of 635nm to transmit therethrough. Then, the red laser light beam which has passed through the reflecting mirror 207 again is condensed by the second condensing lens 208 while passing through the second condensing lens 208 and then passes through the hole section 211 so as to create a laser point of the red light beam.

[41] Lastly, the process of forming a laser point of the red light beam will be described hereinafter.

[42] When the laser pointer 200 simultaneously emits the red laser light beam and the green laser light beam through the red laser diode 209 and the green laser diode 202 under the control of the control section 201, the green laser light beam emitted from the green laser diode 202 is converted into a light beam having a wavelength of 1064nm while passing through the ND:YV04 crystal element 203, and then is amplified into a green laser light beam having a wavelength of 532nm while passing through the KTP crystal element 204. Thereafter, the green laser light beam amplified by the KTP crystal element 204 is condensed by the first condenser lens 205 while passing through the first condenser lens 205, and then is reflected by the reflecting mirror 206 reflecting a laser light beam having a wavelength of 532nm along a given traveling path. Also, the laser light beam emitted from the red laser diode 209 is condensed by the first condenser lens 210 while passing through the first condenser lens 215, and then passes through the reflecting mirror 207 allowing a laser light beam having a wavelength of 532nm to transmit therethrough so as to be emitted along a given traveling path. The green and red laser light beams are condensed by the second condensing lens 208 while passing through the second condensing lens 208 and then passes through the hole section 211 to produce a resultant yellow laser light beam so as to create a laser point of the yellow light beam. The green laser light beam and the red laser light beam are superposed on each other while being emitted along the same traveling path so as to create a yellow-based color in which the green color and the red color are overlapped with each other. Industrial Applicability

[43] As described above, according to the laser pointer of the present invention, a red laser diode or a green laser diode is operated by means of manipulation of a switch to create a red or green-colored point so that a user can express the red or green-colored point to be suited for his or her color preference. Also, the red laser diode and the green laser diode is simultaneously operated by means manipulation of the switch to allow beams of laser light having red and green colors to be superposed on each other so that a color of the imaged point can be expressed as a yellow-based color. Further, the user can selectively express a red point color, a green point color or a yellow-based point color to be suited for his or her taste and color preference to thereby result in diversification of color. In addition, the brightness of the red laser diode and the green laser diode can be adjusted under the control of a control section so as to create a point having various colors such as orange, yellow and yellowish green.

[44] While the preferred embodiment in accordance with the present invention has been described above, it is merely an exemplary embodiment and the present invention is not limited thereto. It will be apparent to those skilled in the art that the embodiment of the present invention can be changed or modified to have other specific forms without departing from the scope and spirit of the invention, other than the above-described embodiment. Therefore, the scope of the invention should be defined by only the appended claims and their equivalents, but not the above-mentioned embodiment.

Claims

[ 1 ] A laser pointer comprising: a casing having a lower main body and a cover mounted with a switch at the outside thereof; a control section electrically connected inside the laser pointer so as to be applied with an operating signal through manipulation of the switch to control the overall operation of an inner system of the laser pointer; a light source section consisting of a red laser diode and a green laser diode and adapted to emit a laser light beam in response to a control signal from the control section; a crystal element for changing the wavelength of a green laser light beam emitted from the green laser diode and amplifying the laser light beam; a plurality of first condenser lenses for condensing the green laser light beam amplified by the crystal element and a red laser light beam emitted from the red laser diode, respectively; a plurality of reflecting mirrors for adjusting the traveling paths of the green and red laser light beams passing through the plurality of condenser lenses; a second condenser lens for condensing a resultant laser light beam reflected by and emitted from the plurality of reflecting mirrors; and a hole section for allowing the resultant laser beam condensed by the second condenser lens to pass therethrough to create a point of the laser beam.

[2] The laser pointer according to claim 1, wherein the crystal element comprises an

ND:YV04 crystal element for allowing the green laser light beam emitted from the green laser diode to be converted into a light beam having a wavelength of 1064nm while passing therethrough, and a KTP crystal element for allowing the green laser light beam to be amplified into a green laser light beam having a wavelength of 532nm while passing therethrough.

[3] The laser pointer according to claim 1, wherein the green laser light beam and the red laser light beam are superposed on each other while being emitted along the same traveling path so as to create a yellow-based color in which the green color and the red color are overlapped with each other.

[4] The laser pointer according to claim 1, wherein the control section adjusts the brightness of the red laser diode and the green laser diode so as to create a point of light beam having various colors such as orange, yellow and yellowish green.

[5] The laser pointer according to claim 1, wherein the selective manipulation of the switch enables a user to selectively express a red point color, a green point color or a yellow-based point color to be suited for his or her taste and color preference.