Miniature halogen light source

Abstract

The utility model discloses a miniature halogen light source which comprises a shell, a circuit board arranged in the shell and a halogen lamp electrically connected with the circuit board, an aspheric condensing lens, a collimating lens and an optical fiber interface sequentially arranged on a light path of the halogen lamp, an optical filter arranged between the aspheric condensing lens and the collimating lens, and a heat dissipation lamp shell arranged outside the halogen lamp. And a cooling fan is arranged on the shell and is electrically connected with the circuit board. According to the utility model, the professional optical collimating lens is adopted, so that a light path can be efficiently coupled into the optical fiber to improve the output light intensity, and the optical fiber light source is a compact miniature halogen tungsten lamp optical fiber light source, covers the wavelength of 380-2500nm, is an ideal choice for scientific research, industry and optical application experiments, and has wide application prospects. And the halogen lamp light source refrigeration mode adopts a single-path air cooling and heat sink structure, so that the optimal working temperature of the light source is ensured, and the light source output is very stable and is as high as 0.1%.

Description

Technical Field

[0001] The utility model relates to the technical field of light sources, in particular to a miniature halogen light source. Background Technique

[0002] A halogen light source is a device that outputs the light emitted by a halogen lamp to a specified area through an optical fiber, and has a wide range of applications. For example, it can be applied to fiber optic sensing, transmission of physical property research of materials, reflection measurement, color measurement, ultraviolet absorption measurement, spectral characteristic analysis, industrial process control, optical elements, thin film measurement, etc.

[0003] Patent CN 211780333 U discloses a fiber optic halogen light source. By arranging an aspherical lens between the halogen lamp cup and the fiber optic fixing frame, the light emitted by the halogen lamp cup is focused into the optical fiber through the aspherical lens, and the optical path coupling efficiency is relatively low; moreover, the components in its shell are arranged dispersedly, making the volume of the shell relatively large and not convenient for applications in scenarios that require a smaller light source. Content of the Utility Model

[0004] In order to solve the deficiencies in the prior art, the utility model provides a miniature halogen light source, which adopts a professional optical collimating lens, can efficiently couple the optical path into the optical fiber to increase the output light intensity, and the utility model is a compact miniature halogen tungsten light source fiber, covering a wavelength range of 380 - 2500nm, and is an ideal choice for scientific research, industry, and optical application experiments.

[0005] The utility model achieves the above object through the following technical solutions:

[0006] A miniature halogen light source includes a shell, a circuit board is arranged in the shell, and a halogen lamp electrically connected to the circuit board. An aspherical condenser lens, a collimating lens, and a fiber optic interface are sequentially arranged on the optical path of the halogen lamp, and a filter is detachably arranged between the aspherical condenser lens and the collimating lens.

[0007] A filter holder is arranged between the aspherical condenser lens and the collimating lens. The filter holder includes a support plate and elastic clips arranged on the support plate. The support plate is provided with a through hole for the optical path to pass through. A slot for inserting the filter is arranged on the shell at a position corresponding to the elastic clips. The gap between the support plate and the elastic clips or the gap between the elastic clips and the side wall of the slot is used to press the filter.

[0008] There are two elastic clips, which are respectively located on both sides of the through hole.

[0009] The elastic clip includes a fixed part, a transition part, and a first clamping part that are connected in sequence. The fixed part is parallel to the connection plane of the support plate it is connected to. The transition part cooperates with the upper surface of the support plate. The first clamping part has a curvature that protrudes towards one side or away from the support plate.

[0010] The elastic clip further includes a second clamping part connected to the first clamping part, and the second clamping part has a curvature opposite to that of the first clamping part.

[0011] The filter holder further includes a pressing plate, and the fixed part of the elastic clip is fixed between the support plate and the pressing plate.

[0012] A groove adapted to the pressing plate is provided on one side of the support plate close to the pressing plate. The fixed part of the elastic clip is placed in the groove and fixed by the pressing plate.

[0013] The aspherical condenser lens is fixed in the housing through a lens holder, and an adjusting component for adjusting the position of the aspherical condenser lens is provided on the lens holder.

[0014] A shutter mechanism is arranged between the aspherical condenser lens and the filter. The shutter mechanism includes a light-shielding member and a motor for controlling the rotation of the light-shielding member. The motor is electrically connected to the circuit board, and the light-shielding member can be one or two.

[0015] A heat-dissipating lamp housing is arranged outside the halogen lamp, and a heat-dissipating fan is arranged on the housing. The heat-dissipating fan is electrically connected to the circuit board.

[0016] A brightness adjustment knob is arranged on the housing, and the brightness adjustment knob is electrically connected to the circuit board.

[0017] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0018] 1. The present utility model adopts a professional optical collimating lens, which can efficiently couple the optical path into the optical fiber to increase the output light intensity. It is a compact micro halogen tungsten lamp fiber light source, covering a wavelength range of 380 - 2500 nm, and is an ideal choice for scientific research, industry, and optical application experiments.

[0019] 2. The positions of the internal components of the present utility model are reasonably designed, improving the space utilization efficiency inside the housing and making the light source have a smaller volume.

[0020] 3. The halogen lamp light source of the present utility model adopts a single-channel air-cooling and heat sink structure for cooling, ensuring the optimal working temperature of the light source. The light source output is very stable, up to 0.1%.

[0021] 4. The light source of the present utility model integrates a filter holder, which can insert different filters, and is very suitable for analyzing and measuring spectral samples with various characteristics within different specific spectral ranges.

[0022] 5. The setting of the brightness adjustment knob of the present utility model facilitates the adjustment of the light source intensity of the halogen lamp; the setting of the shutter mechanism enables TTL shutter control. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] FIG Figure 1 is a schematic diagram of the external structure of the present utility model.

[0024] FIG Figure 2 is a schematic diagram of the internal structure of the present utility model.

[0025] FIG Figure 3 is a schematic diagram of the structures of the components on the light path of the halogen lamp of the present utility model.

[0026] FIG Figure 4 is a schematic diagram of the structure of the heat dissipation lamp housing of the halogen lamp of the present utility model.

[0027] FIG Figure 5 is a schematic diagram of the structure of the filter holder of the present utility model

[0028] FIG Figure 6 is an exploded schematic diagram of the filter holder of the present utility model

[0029] FIG Figure 7 is a schematic diagram of the structure of the lens holder of the present utility model

[0030] Reference numerals shown in the drawings: 1. Housing; 11. Slot; 12. Cooling fan; 13. Brightness adjustment knob; 2. Circuit board; 3. Halogen lamp; 31. Heat dissipation lamp housing; 4. Aspherical condenser lens; 41. Lens holder; 411. Mounting hole; 412. Long hole; 413. Extension plate; 42. Frame; 43. Screw; 5. Collimating lens; 6. Fiber optic interface; 7. Filter; 8. Filter holder; 81. Support plate; 811. Through hole; 812. Groove; 82. Elastic clip; 821. Fixed part; 822. Transition part; 823. First clamping part; 824. Second clamping part; 83. Pressure plate; 9. Shutter mechanism; 91. Light-shielding member; 92. Motor. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] In combination with the drawings and specific embodiments, the present utility model will be further described. It should be understood that these embodiments are only used to illustrate the present utility model and not to limit the scope of the present utility model. In addition, it should be understood that after reading the content taught by the present utility model, those skilled in the art can make various changes or modifications to the present utility model, and these equivalent forms also fall within the scope defined by this application.

[0032] As shown in the attached Figure 1 , the attached Figure 2 , Figure 3 figures, the present utility model provides a micro halogen light source, which includes a housing 1. A circuit board 2 and a halogen lamp 3 electrically connected to the circuit board 2 are arranged inside the housing 1. The halogen lamp 3 can be a tungsten halogen lamp. An aspherical condenser lens 4, a collimating lens 5 and an optical fiber interface 6 are sequentially arranged on the optical path of the halogen lamp 3. A filter 7 is detachably arranged between the aspherical condenser lens 4 and the collimating lens 5. The collimating lens 5 is a plano-convex lens and can be installed in the optical fiber interface 6.

[0033] The principle of the present utility model is as follows: The power supply supplies power to the halogen lamp 3 to emit light. First, it is condensed by the aspherical lens 4, and then the optical path is coupled to the optical fiber interface through the collimating lens 5. Moreover, a filter 7 is detachably arranged between the aspherical condenser lens 4 and the collimating lens 5, increasing the selectivity of the wavelength.

[0034] Further, a filter holder 8 is arranged between the aspherical condenser lens 4 and the collimating lens 5. The filter holder 8 includes a support plate 81 and elastic clips 82 arranged on the support plate 81. The support plate 81 is fixed to the bottom wall of the housing 1. A through hole 811 for the optical path to pass through is arranged on the support plate 81. A slot 11 for inserting the filter 7 is arranged on the housing 1 at a position corresponding to the elastic clips 82. The gap between the support plate 81 and the elastic clips 82 or the gap between the elastic clips 82 and the side wall of the slot 11 is used to press the filter 7. The arrangement of the filter holder 8 facilitates the replacement of different filters 7 and is very suitable for the analysis and measurement of spectral samples with various characteristics in different specific spectral ranges.

[0035] Further, in order to improve the clamping stability of the filter 7, there are two elastic clips 82, which are respectively located on both sides of the through hole 811.

[0036] Further, the elastic clip 82 includes a fixed part 821, a transition part 822 and a first clamping part 823 connected in sequence. The fixed part 821 is parallel to the connection plane of the support plate 81 connected thereto. The transition part 822 is matched with the upper surface of the support plate 81. The first clamping part 823 has a curvature protruding towards or away from the support plate 81. Specifically, the first clamping part 823 is located in the slot 11. Due to its protruding curvature, a clamping part can be formed with the support plate 81 or the side wall of the slot 11 for clamping the filter 7.

[0037] Furthermore, the elastic clip 82 further includes a second clamping portion 824 connected to the first clamping portion 823, and the first clamping portion 823 and the second clamping portion 824 have opposite protruding arcs. The setting of the second clamping portion 824 enables the present utility model to provide two positions for inserting the filter 7 through a set of elastic clips 82, improving the convenience of use.

[0038] Furthermore, the filter holder 8 further includes a pressing plate 83, and the pressing plate 83 is also provided with a through hole for the light path to pass through. The fixing portion 821 of the elastic clip 82 is fixed between the support plate 81 and the pressing plate 83. The setting of the pressing plate 83 improves the fixing stability of the elastic clip 82 and facilitates the replacement of the elastic clip 82.

[0039] Furthermore, a groove 812 adapted to the pressing plate 83 is provided on one side of the support plate 81 close to the pressing plate 83. The fixing portion 821 of the elastic clip 82 can be placed in the groove 812 and fixed by the pressing plate 83. The setting of the groove 812 makes the surface of the pressing plate 83 flush with the surface of the support plate 81, without occupying extra space in the housing 1, making the structure of the housing more compact.

[0040] Furthermore, the aspherical condenser lens 4 is fixed in the housing 1 through a lens holder 41. The lens holder 41 can be fixed on the bottom wall or the upper wall or the side wall of the housing 1, and an adjusting assembly for adjusting the position of the aspherical condenser lens 4 is provided on the lens holder 41.

[0041] In this embodiment, an installation hole 411 for accommodating the aspherical condenser lens 4 is provided on the lens holder 41 along the light path direction. A long hole 412 communicating with the installation hole 411 is provided on one surface of the lens holder 41. The length direction of the long hole 412 is the same as the light path direction. A screw 43 is threadedly connected to the frame 42 of the aspherical condenser lens 4, and the position of the aspherical condenser lens 4 is adjusted by the movement of the screw 43 in the long hole 412.

[0042] Furthermore, a shutter mechanism 9 is provided between the aspherical condenser lens 4 and the filter 7. The shutter mechanism 9 includes a light-shielding member 91 and a motor 92 for controlling the rotation of the light-shielding member. The light-shielding member 91 can be two. The motor 92 is electrically connected to the circuit board 2, and the shutter mechanism 9 can be a TTL shutter control.

[0043] In this embodiment, an extension plate 413 is provided on the lens holder 41. A shaft hole adapted to the output shaft of the motor 92 is provided on the extension plate 413. The motor 92 is located on one side of the halogen lamp 3 and is fixedly connected to the extension plate 413.

[0044] Further, a heat-dissipating lamp housing 31 is provided outside the halogen lamp 3, a heat-dissipating fan 12 is provided on the housing 1, and the heat-dissipating fan 12 is electrically connected to the circuit board 2. The cooling method of the halogen lamp light source adopts a single-channel air cooling and heat sink structure, which ensures the optimal working temperature of the light source, and the light source output is very stable, up to 0.1%.

[0045] Further, in order to facilitate the adjustment of the light source intensity of the halogen lamp 3, a brightness adjustment knob 13 is provided on the housing 1, and the brightness adjustment knob 13 is electrically connected to the circuit board 2.

Claims

1. A micro halogen light source, comprising a housing, characterized in that, A circuit board and a halogen lamp electrically connected to the circuit board are arranged inside the housing. An aspherical condenser lens, a collimating lens, and an optical fiber interface are sequentially arranged on the optical path of the halogen lamp. A filter is detachably arranged between the aspherical condenser lens and the collimating lens.

2. A micro halogen light source according to claim 1, characterized in that, A filter holder is arranged between the aspherical condenser lens and the collimating lens. The filter holder includes a support plate and elastic clips arranged on the support plate. A through hole for the optical path to pass through is arranged on the support plate. A slot for inserting the filter is arranged on the housing at a position corresponding to the elastic clips. The gap between the support plate and the elastic clips or the gap between the elastic clips and the side wall of the slot is used to press the filter.

3. A miniature halogen light source according to claim 2, characterized in that, There are two elastic clips, which are respectively located on both sides of the through hole.

4. A miniature halogen light source according to claim 2, characterized in that, Each elastic clip includes a fixed part, a transition part, and a first clamping part connected in sequence. The fixed part is parallel to the connection plane of the support plate connected thereto. The transition part is matched with the upper surface of the support plate. The first clamping part has a curvature protruding towards or away from the support plate.

5. A miniature halogen light source according to claim 4, characterized in that, The elastic clip further includes a second clamping part connected to the first clamping part. The second clamping part has a protruding curvature opposite to that of the first clamping part.

6. The miniature halogen light source according to claim 4, characterized in that, The filter holder further includes a pressing plate. The fixed part of the elastic clip is fixed between the support plate and the pressing plate.

7. A micro halogen light source according to claim 6, characterized in that, A groove adapted to the pressing plate is arranged on one side of the support plate close to the pressing plate. The fixed part of the elastic clip is placed in the groove and fixed by the pressing plate.

8. A micro halogen light source according to claim 1, characterized in that, The aspherical condenser lens is fixed in the housing through a lens holder. An adjusting assembly for adjusting the position of the aspherical condenser lens is arranged on the lens holder.

9. A miniature halogen light source according to claim 1, characterized in that, A shutter mechanism is arranged between the aspherical condenser lens and the filter. The shutter mechanism includes a light-shielding member and a motor for controlling the rotation of the light-shielding member. The motor is electrically connected to the circuit board.

10. A micro halogen light source according to claim 1, characterized in that, A heat dissipation lamp housing is arranged outside the halogen lamp. A heat dissipation fan is arranged on the housing. The heat dissipation fan is electrically connected to the circuit board. A brightness adjustment knob is arranged on the housing. The brightness adjustment knob is electrically connected to the circuit board.

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