TW201910857A - Light source device - Google Patents

Abstract

A light device for inputting a predetermined spectral light includes a point light source, a first filter, and a light combiner. The point light source emits two first spectral lights along a first light path and a second light path separately. The first light path includes a first optical divergent path. The second light path includes a second optical divergent path. The length of the first optical divergent path is different from the length of the second optical divergent path. The point light source is disposed at the starting points of the first optical divergent path and the second optical divergent path. The first filter is disposed in the first light path and used for turning the first spectral light in the first light path into a second spectral light. The light combiner is disposed at the terminal points of the first light path and the second light path and used for combining the first light path and the second light path to input the predetermined spectral light.

Description

Light source device

The present invention relates to a light source device, and more particularly to a light source device that utilizes a filter and a light path length to produce a predetermined spectral light.

At present, some optical measuring instruments, such as spectrometers, use specific light sources in response to different technical fields and different types of samples. For example, some spectrometers used in biotechnology may require a specific spectrum or a source of specific light intensity to measure a biological sample to obtain spectral data, such as an absorption spectrum. However, existing luminaires, such as incandescent lamps, sometimes emit light that does not have the specific spectrum or specific light intensity required to meet the optical metrology instrument. In other words, some specific spectra or specific light intensities are difficult to obtain directly from existing fixtures. Therefore, how to generate a diverse spectrum is a problem that the optical technology field is currently trying to overcome.

The present invention provides a light source device that utilizes a filter and an optical path length to generate a diverse spectrum.

The light source device provided by the present invention is configured to output preset spectrum light, and includes a point light source, a first filter, and a light combiner. The point source emits two first spectral lights along the first light path and the second light path, respectively. The first optical path includes a first optical divergent path, and the second optical path includes a second divergent optical path, wherein the length of the first divergent optical path is different from the length of the second divergent optical path, and the point light source configuration A divergent optical path and a starting end of the second divergent optical path. The first filter is disposed on the first optical path and is configured to change the light of the first spectrum transmitted on the first optical path to the light of the second spectrum. The light combining unit is disposed at the ends of the first optical path and the second optical path, and is configured to combine the first optical path and the second optical path to output preset spectral light.

In an embodiment of the invention, the light source device further includes a reflecting unit disposed in the second optical path and configured to reflect the light of the first spectrum transmitted on the second optical path.

In an embodiment of the invention, the light source device further includes a penetrating collimating mirror disposed between the point source and the light combining unit and disposed on the first optical path, wherein the first divergent optical path ends in the wearing Transparency collimator.

In an embodiment of the invention, the light source device further includes a penetrating collimating mirror disposed between the point source and the reflecting unit and the second optical path, wherein the second diverging optical path ends in the penetrating collimation mirror.

In an embodiment of the invention, the light source device further includes first and second penetrating collimating mirrors. The first transmissive collimating mirror is disposed between the point source and the light combining unit and disposed on the first optical path, wherein the first divergent optical path terminates in the first transmissive collimating mirror. The second transmissive collimating mirror is disposed between the point source and the reflecting unit and on the second optical path, wherein the second divergent optical path terminates in the second transmissive collimating mirror.

In an embodiment of the invention, the light source device further includes a carrying portion connected to the reflecting unit and configured to move the reflecting unit relative to the point source to change the second optical path.

In an embodiment of the invention, the carrying portion has a driving source and is used to drive the reflecting unit to move.

In an embodiment of the invention, the light combining unit moves relative to the point light source in accordance with the movement of the reflecting unit.

In an embodiment of the invention, the reflecting unit comprises at least one plane mirror.

In an embodiment of the invention, the reflecting unit is a reflective collimating mirror and the second diverging optical path is terminated by the reflecting unit.

In an embodiment of the invention, the light combining unit is a beam splitter.

In an embodiment of the invention, the light combining unit includes a beam splitter, an optical fiber, and a focusing mirror. The beam splitter is used to combine the light of the first spectrum with the light of the second spectrum into preset spectrum light. The fiber is disposed on the path of the preset spectrum light. The focusing mirror is disposed on the path of the preset spectrum light, and between the beam splitter and the optical fiber, wherein the focusing mirror is coupled to the optical fiber.

In an embodiment of the invention, the point source includes a light source, a reflective shell, a first diffuser, and a second diffuser. The reflective shell surrounds the light source and has a first light exit port and a second light exit port. The first diffusion sheet is disposed on the first light exit port. The second diffusion sheet is disposed on the second light exiting port, wherein the light of the first spectrum penetrates the first diffusion sheet and the second diffusion sheet, respectively, and the first divergent optical path and the second divergent optical path are both from the second diffusion sheet .

In an embodiment of the invention, the light source device further includes a second filter disposed on the second optical path and configured to change a portion of the first spectrum of light transmitted on the second optical path to a third frequency spectrum. Light, wherein a portion of the light of the first spectrum is obscured by the second filter.

In an embodiment of the invention, the light source device further includes an auxiliary lamp for emitting auxiliary light, and the auxiliary light, the light of the first spectrum, and the light of the second spectrum are combined.

In an embodiment of the invention, the light source device further includes a light attenuating unit disposed on the first optical path and/or the second optical path.

In an embodiment of the invention, the light attenuating unit is an integrating sphere or a dimming sheet.

In an embodiment of the invention, the light source device further includes a lens unit disposed on the second optical path, wherein the second divergent optical path terminates in the lens unit.

In an embodiment of the invention, the lens unit is a liquid lens.

In an embodiment of the invention, the lens unit includes at least one lens and a fixing frame. The lens is disposed on the second optical path. The holder has a plurality of fixing portions, wherein the fixing portions are along the second optical path, and the lens is detachably disposed at the fixing portion.

In an embodiment of the invention, each of the fixing portions is a slot.

The present invention adjusts the energy of light (e.g., light R1 of the first spectrum) by varying the length of the diverging optical path (e.g., the second divergent optical path) in the optical path to change the spectrum of the predetermined spectral light. Therefore, the light source device of the present invention can generate a diverse spectrum to meet the needs of optical measuring instruments.

The above and other objects, features and advantages of the present invention will become more <RTIgt;

Fig. 1A is a schematic view of a light source device according to an embodiment of the present invention. Referring to FIG. 1A , the light source device 100 includes a point light source 110 , a light combining unit 120 , and a first filter 131 . The point light source 110 is, for example, an incandescent lamp, a halogen lamp or other light source, and the present embodiment is described by taking a halogen lamp as an example. When the point source 110 emits light, the point source 110 emits light substantially in all directions. That is to say, the point source 110 will emit multiple rays along a plurality of different directions. Taking FIG. 1A as an example, the point source 110 emits two first spectrums of light R1 in two different directions.

Specifically, in the embodiment shown in FIG. 1A, the point light source 110 emits two lights R1 of the first spectrum along the first optical path P11 and the second optical path P12, respectively. Under the condition that the light R1 of the first spectrum directly emitted by the point source 110 is not collimated or focused, according to the basic knowledge of general optics, the energy of the attenuated first spectrum of light R1 will be The distance of the distance of the transmission path is inversely proportional, that is, the longer the path of the light R1 of the first spectrum travels, the more the energy of the light R1 of the first spectrum is attenuated, and the light that is not collimated or focused (for example, the first spectrum) Light R1) is referred to herein as a divergent light beam.

The first filter 131 is disposed on the first optical path P11 and is configured to change the light R1 of the first spectrum transmitted on the first optical path P11 to the light R2 of the second spectrum. The light combining unit 120 is, for example, a beam splitter, and is disposed at the ends of the first light path P11 and the second light path P12, wherein the light combining unit 120 is configured to combine the first light path P11 and the second light path P12 to output the preset spectrum light R3. In this manner, the light source device 100 can output the preset spectrum light R3 obtained by combining the light R1 of the first spectrum and the light R2 of the second spectrum. In addition, depending on different requirements, the beam splitter (ie, the light combining unit 120) may have different ratios of penetration and reflection, such as a ratio of penetration and reflection of 1:1, and a ratio of penetration and reflection of, for example, 2:1. . Further, in the present embodiment, the light combining unit 120 is a beam splitter, but in other embodiments, the light combining unit 120 may be a Y-type optical fiber, so the light combining unit 120 is not limited to a Y-type optical fiber.

The light source device 100 further includes a reflection unit 140 disposed on the second optical path P12 and configured to reflect the light R1 of the first spectrum transmitted on the second optical path P12, wherein the reflection unit 140 can reflect the light R1 of the first spectrum to the same Light unit 120. In addition, the light source device 100 further includes a carrying portion 150 having a power source and a transmission device (both not shown). The power source is a device that can generate mechanical energy, such as a motor. The transmission can transfer mechanical energy and can include gears, pulleys, crankshafts, linkages or other mechanical parts, or any combination of these. The transmission device is connected to the power source and the reflection unit 140, that is, the carrier portion 150 is connected to the reflection unit 140. When the power source is capable of generating mechanical energy, the transmission can transmit mechanical energy to the reflecting unit 140 to enable the carrying portion 150 to drive the reflecting unit 140 to move relative to the point source 110, changing the second optical path P12. In this embodiment, the reflection unit 140 can move along the line connecting the reflection unit 140 and the light combining unit 120 in FIG. 1A, and the reflection unit 140 adaptively rotates with different positions to reflect the light R1 of the first spectrum to the light combination unit. 120.

In another embodiment, the reflection unit 140 can move along the line connecting the reflection unit 140 and the point source 110 in FIG. 1A, and the light combining unit 120 moves with respect to the point source 110 in cooperation with the movement of the reflection unit 140 to maintain The light R1 of the first spectrum can be aligned with the light combining unit 120. One skilled in the art can also change the embodiment in which the reflective unit 140 couples light to the light combining unit 120 as desired. In addition, in this embodiment, the carrying portion 150 has a power source to move the reflecting unit 140, but in other embodiments, the carrying portion 150 may not have any power source, and the user can manually The carrier 150 is moved. Therefore, the carrying portion 150 is not limited to necessarily have a power source.

The first optical path P11 and the second optical path P12 each include a divergent optical path, wherein the first optical path P11 includes a first divergent optical path, and the second optical path P12 includes a second divergent optical path. For example, in FIG. 1A, no optical collimator or optical focusing member (for example, a convex lens) is disposed on the first optical path P11 and the second optical path P12, so that the entire first optical path P11 is the first divergent optical path. The entire second optical path P12 is a second divergent optical path.

The first optical path P11 starts at the point light source 110 and ends at the light combining unit 120. Similarly, the second optical path P12 also starts at the point source 110 and ends at the combining unit 120. Therefore, the point light source 110 configures the first divergent optical path and the beginning end of the second divergent optical path, and the light combining unit 120 configures the first divergent optical path and the terminating end of the second divergent optical path. Furthermore, the length of the first divergent optical path is different from the length of the second divergent optical path. Taking FIG. 1A as an example, the length of the second divergent optical path (ie, the second optical path P12) is greater than the length of the first divergent optical path (ie, the first optical path P11), so that the energy reduction of the light R1 of the first spectrum may be greater than Light R2 of the second spectrum.

For example, the first optical path P11 may be 5 cm, and the second optical path P12 may be 8 cm. According to the basic optical knowledge, the energy of the light R2 of the second spectrum after passing through the first optical path P11 will be 1/25 of the original (regardless of the influence of the first filter 131 on energy), and after passing through the second optical path P12 The energy of the light R1 of the first spectrum will be 1/64 of the original, wherein the wavelength of the light R1 of the first spectrum is greater than the wavelength of the light R2 of the second spectrum. Thus, the energy of the light R1 of the first spectrum of the long wavelength is greatly suppressed to obtain the preset spectrum light R3 whose short wavelength and long wavelength are balanced.

FIG. 1B is a frequency spectrum diagram of light originally emitted by the point source in FIG. 1A. Referring to FIG. 1A and FIG. 1B, the curve C0 shown in FIG. 1B represents the light R1 that has just been emitted from the point source 110 without passing through the first spectrum of the first filter 131. That is, the curve C0 is the spectrum of the point source 110 (ie, the first spectrum). In general, the long-wavelength energy of the point source 110 is too strong, but the short-wavelength energy is too weak. As shown in FIG. 1B, the energy of the first spectrum of light R1 between 400 nm and 800 nm is greater than 400 nm. The energy of the first spectrum of light R1.

FIG. 1C is a frequency spectrum diagram of light after passing through the first optical path P11 in FIG. 1A. Referring to FIG. 1A to FIG. 1C , since the first filter 131 is disposed on the first optical path P11 , the light R1 passing through the first spectrum of the first optical path P11 passes through the first filter 131 and is changed to the first The light of the two spectrums R2 is as shown by curve C2 in Fig. 1C.

In this embodiment, the first filter 131 can be a short wave pass filter, so the low frequency portion of the light R1 of the first spectrum, that is, the long wavelength portion, is used by the first filter. The 131 filter is filtered out, and the first filter 131 passes only the high frequency portion (i.e., the portion of the short wavelength) of the light R1 of the first spectrum, thereby forming the light R2 of the second spectrum. Since the light R1 of the first spectrum and the light R2 of the second spectrum transmitted on the first optical path P11 are not collimated or focused, the energy of the light R2 of the second spectrum after passing through the first optical path P11 is also attenuated. Thus, a spectrum as shown by the curve C2 is formed.

FIG. 1D is a schematic diagram of the spectrum of light after passing through the second optical path in FIG. 1A. Referring to FIG. 1B and FIG. 1D, in the embodiment, although no filter is disposed on the second optical path P12, the light R1 of the first spectrum on the second optical path P12 is not collimated or focused, so The energy of the light R1 of the first spectrum after passing through the second optical path P12 is also attenuated, thereby forming a spectrum as shown by a curve C1 in FIG. 1D.

FIG. 1E is a schematic diagram of the frequency spectrum of the preset spectrum light in FIG. 1A. Referring to FIG. 1C, FIG. 1D and FIG. 1E, the curve C3 in FIG. 1E is the spectrum of the preset spectrum light R3. In this embodiment, the preset spectrum light R3 is formed by combining the light R1 of the first spectrum with the light R2 of the second spectrum, so the curve C3 is substantially the result of adding the curves C1 and C2. Therefore, it can be seen that the light source device 100 can output the preset spectral light R3 with a relatively smooth spectrum, such as the filtering of the first filter 131 and the attenuation of the first optical path P11 and the second optical path P12 with respect to the light R1 of the first spectrum. Figure 1E shows.

In addition, since the carrying portion 150 can move the reflecting unit 140 to change the second optical path P12, and the light R1 of the first spectrum transmitted on the second optical path P12 is inversely proportional to the square of the distance of the second optical path P12, The change of the second optical path P12 by the carrying portion 150 can adjust the energy of the light R1 of the first spectrum on the second optical path P12, that is, change the curve C1 shown in FIG. 1D. In this way, the light source device 100 can further change the spectrum of the preset spectrum light R3 (ie, the curve C3), thereby generating a diverse spectrum, which satisfies the requirements of a plurality of optical measuring instruments for a specific spectrum.

Specifically, in the embodiment shown in FIG. 1A, the reflection unit 140 includes only one plane mirror, that is, the reflection unit 140 is a plane mirror, but in other embodiments, the reflection unit 140 may also include at least two plane mirrors, as shown in FIG. 2 . The illustrated light source device 200 includes a two-sided planar mirror 241.

Referring to FIG. 2, the light source device 200 is similar to the light source device 100 of FIG. 1A. The difference characteristics of the light source device 200 from the light source device 100 will be mainly described below, and the same features will not be repeatedly described. In the light source device 200, the reflection unit 240 includes two plane mirrors 241 which are obliquely opposite to each other and disposed on the second optical path P22, that is, the plane mirrors 241 are parallel to each other. Through the plane mirrors 241, the reflection unit 240 can reflect the light R1 of the first spectrum transmitted on the second optical path P22 so that the light R1 of the first spectrum can be incident on the light combining unit 120. In this way, the light R1 of the first spectrum can be combined with the light R2 of the second spectrum into the preset spectrum light R3.

The light source device 200 may further include a carrying portion 250 having a composition and function similar to that of the carrying portion 150, and also including a power source and a transmission. The carrying portion 250 connects the plane mirrors 241 and enables the plane mirrors 241 to move relative to the point source 110 to change the second optical path P22. In this way, the light source device 200 can also adjust the energy of the light R1 of the first spectrum on the second optical path P22, thereby changing the spectrum of the preset spectrum light R3.

Fig. 3 is a schematic view of a light source device according to another embodiment of the present invention. Referring to FIG. 3, the light source device 300 of the present embodiment is similar to the light source device 100 of the foregoing embodiment, and has the same functions and advantages, and further includes the same components. The difference between the light source devices 300 and 100 will be mainly described below.

Different from the foregoing embodiment, the light source device 300 further includes an optical collimator for collimating the light R1 of the first spectrum emitted by the point source 110. Specifically, the light source device 300 includes a transmissive collimating mirror 360. The penetrating collimating mirror 360 is disposed between the point light source 110 and the light combining unit 120 and disposed on the first optical path P31. In this embodiment, the first filter 131 is disposed between the transmissive collimating mirror 360 and the light combining unit 120, so the first filter 131 changes the collated light R1 of the first spectrum. It is the light R2 of the second spectrum, and the light R2 of the second spectrum is substantially collimated parallel light.

In addition, the reflecting unit 340 included in the light source device 300 is a reflective collimating mirror, which is, for example, a concave reflecting mirror. When the diverged first spectrum of light R1 is incident on the reflection unit 340 from the point source 110, the reflection unit 340 can not only reflect the light R1 of the first spectrum but also collimate the light R1 of the first spectrum to make the first spectrum The light R1 becomes parallel light. Therefore, the person skilled in the art can select the appropriate focal length and the configuration of the collimating mirror to modulate the energy distribution of each wavelength in the preset spectrum light R3, thereby obtaining the preset spectrum light R3 of the desired energy distribution, which satisfies the specificity. The need for optical metrology instruments such as spectrometers.

It should be noted that, in the embodiment shown in FIG. 3, since the light R1 of the first spectrum and the light R2 of the second spectrum are both collimated, unlike the embodiment of FIG. 1A, the entire first optical path P31 and the whole The second optical path P32 is not a divergent optical path. In detail, the first optical path P31 includes a first divergent optical path, and the second optical path P32 includes a second divergent optical path. Both the first and second divergent optical paths start at point source 110, wherein the first divergent optical path terminates in transmissive collimating mirror 360 and the second divergent optical path terminates in reflective unit 340. The light R1 transmitting the first spectrum outside the first and second divergent optical paths and the light R2 of the second spectrum are substantially parallel light, and the energy attenuation of the parallel light is not inversely proportional to the square of the distance of the transmission path. In addition, in order to clearly present the first and second divergent optical paths, all the patterns in the present case (for example, FIG. 3) represent the first and second, respectively, with a coarse first spectrum of light R1 and a coarse second spectrum of light R2. Divergence of the path.

4 is a schematic view of a light source device according to another embodiment of the present invention. Referring to FIG. 4, the light source device 400 is similar to the light source device 300 of FIG. 3, and has the same functions and advantages, and further includes the same components. The difference between the light source devices 400 and 300 will be mainly described below.

Unlike the light source device 300, the light source device 400 includes the reflective unit 140, but does not include the reflective unit 340, and the light source device 400 further includes two penetrating collimating mirrors: the first penetrating collimating mirror 461 and the second penetrating Collimating mirror 462. The first transmissive collimating mirror 461 is disposed between the point source 110 and the light combining unit 120 and on the first optical path P41, and the second transmissive collimating mirror 462 is disposed between the point source 110 and the reflecting unit 140 and On the second optical path P42. In this embodiment, the first optical path P41 includes a first divergent optical path, and the second optical path P42 includes a second divergent optical path, wherein the first divergent optical path terminates in the first transmissive collimating mirror 461, and the second The divergent optical path terminates in a second transmissive collimating mirror 462.

In the embodiment of FIG. 4, the light source device 400 includes two transmissive collimating mirrors (the first transmissive collimating mirror 461 and the second transmissive collimating mirror 462), but in other embodiments, the light source The device 400 may also include only one transmissive collimating mirror, that is, one of the first transmissive collimating mirror 461 and the second transmissive collimating mirror 462 in FIG. 4 may be omitted.

Fig. 5A is a schematic view of a light source device according to another embodiment of the present invention. Referring to FIG. 5A, the light source device 500a of the present embodiment is similar to the light source device 100 of FIG. 1A, and has the same functions and advantages, and further includes the same components. The difference between the light source devices 500a and 100 will be mainly described below.

Compared with the light source device 100 of FIG. 1A, the light source device 500a further includes a lens unit 570a disposed on the second optical path P52a, and the lens unit 570a is disposed between the light combining unit 120 and the reflective unit 140. The lens unit 570a can collimate or focus the light R1 of the first spectrum. When the lens unit 570a collimates the light R1 of the first spectrum, the light R1 of the first spectrum is changed into the parallel light by the lens unit 570a, so the light of the first spectrum of light R1 emitted from the lens unit 570a is not transmitted and transmitted. The square of the distance of the path is inversely proportional, and the second divergent optical path included in the second optical path P52a terminates at the lens unit 570a, like the light R1 of the thin first spectrum shown on the right side of FIG. 5A.

The lens unit 570a includes a lens 571 and a fixing frame 572, wherein the lens 571 is disposed on the fixing frame 572 and the second optical path P52a to enable the light R1 of the first spectrum to penetrate the lens 571. The lens 571 can be a convex lens. Therefore, the second divergent optical path is actually terminated by the lens 571. The holder 572 may have a plurality of fixing portions 572h, and the lens 571 is detachably disposed to one of the fixing portions 572h. For example, each of the fixing portions 572h may be a slot that can be engaged with the lens 571 so that the lens 571 can be detachably inserted into any of the fixing portions 572h, thereby changing the position of the lens 571. As such, when the carrying portion 150 moves the reflecting unit 140 to change the second divergent optical path, the lens unit 570a can change the position of the lens 571 to adjust the focal length in accordance with the changed second divergent optical path, thereby allowing the incident light to be combined with the light combining unit. The light R1 of the first spectrum of 120 is collimated.

These fixing portions 572h are arranged along the second optical path P52a so that the light R1 of the first spectrum can penetrate the lens 571 regardless of which fixing portion 572h the lens 571 is disposed. Further, in the present embodiment, the second optical path P52a may be coaxial with the optical axis of the lens 571 such that the light R1 of the first spectrum can penetrate the lens 571 along the optical axis of the lens 571. .

In the embodiment of FIG. 5A, the number of lenses 571 included in the lens unit 570a is only one, and the lens 571 shown in FIG. 5A is a convex lens, but in other embodiments, the number of lenses 571 included in the lens unit 570a is There may be more than one, and the lenses 571 may include at least one convex lens and at least one concave lens such that the lenses 571 disposed on the holder 572 can constitute one lens group, and thus the lens unit 570a can include at least two identical or different lenses. 571, it is not limited to include only one lens 571.

It is worth mentioning that, in addition to the lens unit 570a shown in FIG. 5A, the lens unit 570a can also be implemented by other implementation means, such as the lens unit 570b shown in FIG. 5B. Referring to FIG. 5B, the light source device 500b is substantially similar to the light source device 500b of FIG. 5A, and the difference between the light source devices 500b and 500a is only that the lens unit 570b included in the light source device 500b is different from FIG. 5A. Lens unit 570a, which is a liquid lens.

Specifically, the liquid lens is a zoom lens capable of changing the focal length by using a voltage, and its main principle is to use a voltage to change a boundary shape between two different liquids to achieve a zooming effect. When the carrying portion 150 moves the reflecting unit 140 to change the second divergent optical path, the lens unit 570b disposed on the second optical path P52b can change the focal length by adjusting the voltage to match the changed second divergent optical path, allowing the incident The light R1 of the first spectrum of the light combining unit 120 is collimated.

Fig. 6A is a schematic view of a light source device according to another embodiment of the present invention. Referring to FIG. 6A, the light source device 600 of the present embodiment is similar to the light source device 100 of FIG. 1A, and also includes the same elements. The difference between the light source devices 600 and 100 will be mainly described below: the light combining unit 620, the light attenuating unit 670, and the auxiliary lamp 680 included in the light source device 600.

Unlike the light combining unit 120 of FIG. 1A, the light combining unit 620 is an assembly in which a plurality of elements are combined. Specifically, the light combining unit 120 includes a beam splitter 621, a focusing mirror 622, and an optical fiber 623. The beam splitter 621 is substantially identical to the light combining unit 120 of FIG. 1A, so the beam splitter 621 can combine the light R1 of the first spectrum with the light R2 of the second spectrum into the preset spectrum light R3. The focusing mirror 622 is, for example, a convex lens, and is disposed on a path of the preset spectrum light R3 and between the beam splitter 621 and the optical fiber 623. The optical fiber 623 is disposed on the path of the preset spectral light R3, wherein the focusing mirror 622 is coupled to the optical fiber 623 to reduce the energy loss when the predetermined spectral light R3 is transmitted from the focusing mirror 622 to the optical fiber 623.

The light attenuation unit 670 is disposed on the first optical path P11 and/or the second optical path P62. Taking FIG. 6A as an example, the light attenuating unit 670 is disposed on the second optical path P62 and located in the second optical path P62 between the point source 110 and the reflecting unit 140, and the light attenuating unit 670 can directly attenuate the energy of the light. In other words, in the present embodiment, the light source device 600 attenuates not only the divergence optical path of the first optical path P11 and the second optical path P62 but also the energy of the light R1 of the first spectrum and the light R2 of the second spectrum, and also The light attenuation unit 670 is utilized to attenuate the energy of the light R1 of the first spectrum. Further, the light attenuating unit 670 may be an integrating sphere or a dimming sheet.

In addition, the light source device 600 may further include an auxiliary lamp 680 capable of emitting auxiliary light R5 to the optical fiber 623 to combine the preset spectral light R3 with the auxiliary light R5, that is, the auxiliary light R5, the light R1 of the first spectrum, and the second spectrum. The light R2 is combined with each other. In this embodiment, the optical fiber 623 is a Y-type optical fiber, and the preset spectral light R3 and the auxiliary light R5 are respectively incident on both ends of the optical fiber 623, wherein the auxiliary light R5 can complement the spectrum lacking the preset spectrum light R3, and the improvement is improved. The spectrum of the spectrum light R3 is set to meet the requirements of the optical measuring instrument. Additionally, the auxiliary light 680 can be a Light Emitting Diode (LED). In another embodiment, the focusing mirror can also be configured to enhance the coupling efficiency of the light between the auxiliary lamp 680 and the optical fiber 623. In yet another embodiment, the fiber 623 can also be replaced with a beam splitter.

Referring to FIG. 6A and FIG. 6B, in the embodiment, the light source device 600 may include two filters: a first filter 131 and a second filter 132, wherein the first filter 131 and the second filter The light sheets 132 are respectively disposed on the first optical path P11 and the second optical path P62, and the second filter 132 is capable of changing the light R1 of the portion of the first frequency spectrum transmitted on the second optical path P62 to the light R4 of the third frequency spectrum. In other embodiments, the second filter 132 can be a dimming sheet.

As shown in FIG. 6B, the light R1 of the first spectrum and the light R2 of the second spectrum are both beams and have a waist. When the light R1 of the first spectrum is incident on the second filter 132, only part of the light R1 of the first spectrum passes through the second filter 132 and enters the beam splitter 621, and some of the light of the first spectrum does not have R1. The light is incident on the second filter 132 and directly incident on the beam splitter 621. That is, a portion of the light R1 of the first spectrum is shielded by the second filter 132. Therefore, the second filter 132 can change the light R1 of the portion of the first spectrum transmitted on the second optical path P62 to the light R4 of the third spectrum, but the light R1 of the other portion of the first spectrum is not filtered by the second The patch 132 is masked and remains unchanged.

Referring to FIG. 6C, in the embodiment, the second filter 132 may have four shielding portions 132a, 132b, 132c and 132d and may rotate along the center C32 thereof, and the light source device 600 further includes an adjustable device ( Not shown), which is connected to the second filter 132, wherein the adjustable device can be realized by a simple mechanical structure, for example, the adjustable device can include a gear or a wheel or the like to enable the second filter 132 to follow Center C32 rotates. The shielding portions 132a, 132b, 132c and 132d are used to shield the first spectrum of light R1, and the areas of the shielding portions 132a, 132b, 132c and 132d are different, wherein the area is arranged from small to large to be the shielding portion 132a. 132b, 132c and 132d. Through the rotation of the second filter 132, the second filter 132 can change the area of the light R1 that blocks the first spectrum. In this way, the adjustable device can adjust the ratio of the second filter 132 to block the light R1 of the first spectrum, thereby adjusting the spectrum of the preset spectrum light R3.

Therefore, in the embodiment shown in FIG. 6A and FIG. 6B, the preset spectrum light R3 is actually formed by combining the light R1 of the first spectrum, the light R2 of the second spectrum, and the light R4 of the third spectrum. Therefore, the spectrum of the preset spectrum light R3 also includes the third spectrum. In the present embodiment, the second filter 132 is rotated to change the area of the second spectrum 132 by the light R1 of the first spectrum, thereby adjusting the brightness of the light R4 of the third spectrum. In this way, through the rotation of the second filter 132, the spectrum of the preset spectrum light R3 can be changed to generate a diverse spectrum, which satisfies the requirements of various optical measuring instruments. A person skilled in the art may also adjust the ratio of the second filter 132 to block the light R1 of the first spectrum, for example, the second filter 132 may also move in a direction perpendicular to the second optical path P62 to adjust the first A spectrum of light R1 is incident on the area of the second filter 132. In addition, it should be noted that the second color filter 132 disclosed in FIG. 6A and FIG. 6B can also be applied to the light source devices 100, 200, 300, 400, 500a, and 500b in the foregoing embodiments, and in the foregoing embodiments. The light combining unit 120 can also be replaced with the light combining unit 620 in FIG. 6A. In addition, the focusing mirror 622 can also be applied to the light source devices 100, 200, 300, 400, 500a, and 500b in the foregoing embodiments, and is disposed on the transmission path of the preset spectrum light R3.

Fig. 7 is a schematic view of a light source device according to another embodiment of the present invention. Referring to FIG. 7, the light source device 700 of the present embodiment is similar to the light source device 100 of the embodiment of FIG. 1A, and the difference between the two is that the light source device 700 includes a point light source 710 including a light source 711 and a reflective shell. 712. The first diffusion sheet 713a, the second diffusion sheet 713b, and the outer casing 720, wherein the outer casing 720 covers the light source 711, the reflective shell 712, the first diffusion sheet 713a, and the second diffusion sheet 713b to protect the components while blocking the outside. Light enters the light source device 700. Furthermore, the light source devices 100, 200, 300, 400, 500a, 500b, and 600 of the foregoing embodiments may also include a housing 720 to protect these components while blocking external light.

The light source 711 is, for example, an incandescent lamp or a halogen lamp, so the light source 711 can be the point source 110 of FIG. 1A and can emit a plurality of first spectrum of light R1. The reflector 712 surrounds the light source 711 and has two openings, and the two openings are a first light exit port H71 and a second light exit port H72, respectively, wherein the reflective shell 712 can be an integrating sphere. The first diffuser 713a and the second diffuser 713b are respectively disposed on the first light exit port H71 and the second light exit port H72, and the light R1 of the first spectrum emitted by the light source 711 can penetrate the first diffusion sheet 713a and The second diffusion sheet 713b.

When the light R1 of the first spectrum is incident on the first diffusion sheet 713a and the second diffusion sheet 713b, both the first diffusion sheet 713a and the second diffusion sheet 713b can scatter the light R1 of the first spectrum, so from the first diffusion sheet 713a The light R1 of the first spectrum emitted by the second diffusion sheet 713b is a divergent light beam, and in the light source device 700, the first divergent optical path (not labeled) and the second divergent optical path (not labeled) start from the first A diffusion sheet 713a and a second diffusion sheet 713b. In addition, it should be noted that the light source device 700 may also include the second color filter 132 disclosed in FIG. 6A and FIG. 6B, and the point light source 110 in the foregoing embodiments may also be replaced with the point light source 710 in FIG.

In summary, the present invention adjusts the energy of light (e.g., light R1 of the first spectrum) by changing the length of the diverging optical path (e.g., the second divergent optical path) of the optical path, thereby changing the spectrum of the predetermined spectral light. As such, the preset spectrum light generated by the light source device of the present invention can have a diverse spectrum to meet the needs of a plurality of optical measuring instruments for a particular spectrum.

Although the present invention has been disclosed in the above preferred embodiments, it is not intended to limit the invention, and it is intended to be a part of the invention. The scope of protection of the present invention is therefore defined by the scope of the appended claims.

100, 200, 300, 400, 500a, 500b, 600, 700‧‧‧ light source devices

110, 710‧‧ ‧ point light source

120, 620‧‧ ‧ light unit

131‧‧‧First filter

132‧‧‧Second filter

132a, 132b, 132c, 132d‧‧‧

140, 240, 340‧‧ ‧ reflection unit

150, 250‧‧ ‧ Carrying Department

241‧‧‧Flat mirror

360‧‧‧Transmissive collimating mirror

461‧‧‧First penetrating collimating mirror

462‧‧‧Second penetrating collimating mirror

570a, 570b‧‧‧ lens unit

571‧‧‧ lens

572‧‧‧Retaining frame

572h‧‧‧Fixed Department

621‧‧‧beam splitter

622‧‧‧ focusing mirror

623‧‧‧ fiber optic

670‧‧‧Light attenuation unit

680‧‧‧Auxiliary lights

711‧‧‧Light source

712‧‧‧Reflective shell

713a‧‧‧First diffuser

713b‧‧‧Second diffusion film

720‧‧‧shell

C0, C1, C2, C3‧‧‧ curves

C32‧‧‧ Center

H71‧‧‧The first light exit

H72‧‧‧Second light exit

P11, P31, P41‧‧‧ first light path

P12, P22, P32, P42, P52a, P52b, P62‧‧‧ second light path

R1‧‧‧Light of the first spectrum

R2‧‧‧Light of the second spectrum

R3‧‧‧Preset spectrum light

R4‧‧‧Light of the third spectrum

R5‧‧‧Auxiliary light

Fig. 1A is a schematic view of a light source device according to an embodiment of the present invention. FIG. 1B is a schematic diagram showing the spectrum of light just emitted by the point source in FIG. 1A. FIG. 1C is a schematic diagram of the spectrum of light after passing through the first optical path in FIG. 1A. FIG. 1D is a schematic diagram showing the spectrum of light after passing through the second optical path in FIG. 1A. FIG. 1E is a schematic diagram of the frequency spectrum of the preset spectrum light in FIG. 1A. 2 is a schematic view of a light source device according to another embodiment of the present invention. Fig. 3 is a schematic view of a light source device according to another embodiment of the present invention. 4 is a schematic view of a light source device according to another embodiment of the present invention. Fig. 5A is a schematic view of a light source device according to another embodiment of the present invention. Fig. 5B is a schematic view of a light source device according to another embodiment of the present invention. Fig. 6A is a schematic view of a light source device according to another embodiment of the present invention. Figure 6B is an enlarged schematic view of the second filter of Figure 6A. Figure 6C is a top plan view of the second filter of Figure 6A. Fig. 7 is a schematic view of a light source device according to another embodiment of the present invention.

Claims (22)

A light source device for outputting a predetermined spectrum of light, and comprising: a light source, respectively emitting light of a first spectrum along a first optical path and a second optical path, wherein the first optical path includes a first divergent optical path, The second optical path includes a second divergent optical path, wherein the length of the first divergent optical path is different from the length of the second divergent optical path, and the point light source configures the first divergent optical path and the second divergent optical path a first filter disposed on the first optical path and configured to change light of the first spectrum transmitted on the first optical path into light of a second spectrum; and a light combining unit And configured to be disposed at the ends of the first optical path and the second optical path, and configured to output the preset spectrum light by combining the first optical path and the second optical path. The light source device of claim 1, further comprising: a reflecting unit disposed on the second optical path and configured to reflect the light of the first spectrum transmitted on the second optical path. The light source device of claim 1, further comprising: a penetrating collimating mirror disposed between the point source and the light combining unit and disposed on the first optical path, wherein the first divergent optical path Terminates in the penetrating collimating mirror. The light source device of claim 2, further comprising: a penetrating collimating mirror disposed between the point source and the reflecting unit and the second optical path, wherein the second divergent optical path terminates in the wearing Transparency collimator. The light source device of claim 2, further comprising: a first penetrating collimating mirror disposed between the point source and the light combining unit, and disposed on the first optical path, wherein the first hair The astigmatism end is terminated by the first penetrating collimating mirror; and a second penetrating collimating mirror is disposed between the point source and the reflecting unit and the second optical path, wherein the second divergent optical path Terminates in the second penetrating collimating mirror. The light source device of claim 2, further comprising a carrying portion connected to the reflecting unit and configured to move the reflecting unit relative to the point source to change the second optical path. The light source device of claim 6, wherein the carrying portion has a driving source and is configured to drive the reflecting unit to move. The light source device of claim 6, wherein the light combining unit moves relative to the point light source in conjunction with the movement of the reflecting unit. The light source device of claim 2, wherein the reflecting unit comprises at least one plane mirror. The light source device of claim 2, wherein the reflecting unit is a reflective collimating mirror, and the second diverging optical path is terminated by the reflecting unit. The light source device of claim 1, wherein the light combining unit is a beam splitter or a Y-type fiber. The light source device of claim 1, wherein the light combining unit comprises: a beam splitter for combining the light of the first spectrum with the light of the second spectrum to form the predetermined spectrum light; a path of the predetermined spectral light; and a focusing mirror disposed on the path of the predetermined spectral light and between the beam splitter and the optical fiber, wherein the focusing mirror is coupled to the optical fiber. The light source device of claim 1, wherein the point source comprises: a light source; a reflective shell surrounding the light source and having a first light exit and a second light exit; a first diffuser, configured And the second light-emitting port is disposed on the second light-emitting port, wherein the light of the first spectrum penetrates the first diffuser and the second diffuser respectively, and the first hair The astigmatism path and the second divergent optical path start from the first diffusion sheet and the second diffusion sheet, respectively. The light source device of claim 13, further comprising a second filter disposed on the second optical path and configured to change a portion of the first spectrum of light transmitted on the second optical path to a first A light of three spectra, wherein a portion of the light of the first spectrum is obscured by the second filter. The light source device of claim 14, further comprising an adjustable device coupled to the second filter and adapted to adjust a ratio of the second filter to shield light of the first spectrum. The light source device of claim 1, further comprising an auxiliary lamp for emitting an auxiliary light, wherein the auxiliary light, the light of the first spectrum and the light of the second spectrum are combined. The light source device of claim 1, further comprising a light attenuating unit disposed on the first optical path and/or the second optical path. The light source device of claim 17, wherein the light attenuating unit is an integrating sphere or a dimming sheet. The light source device of claim 1, further comprising: a lens unit disposed on the second optical path, wherein the second divergent optical path terminates in the lens unit. The light source device of claim 19, wherein the lens unit is a liquid lens. The light source device of claim 19, wherein the lens unit comprises: at least one lens disposed on the second optical path; and a fixing frame having a plurality of fixing portions, wherein the fixing portions are along the second optical path Arranged, and one of the at least one lens is detachably disposed on one of the fixing portions. The light source device of claim 21, wherein each of the fixing portions is a slot.