TW201600837A - Spectrometer - Google Patents

Abstract

A spectrometer configured to analyze a light to be measured is provided. The spectrometer includes a spectroscopic unit, a light detector, and a processing unit. The spectroscopic unit disperses different wavelength compositions of the light. The light detector detects the dispersed light to obtain a spectrum. The processing unit is electrically connected to the light detector and configured to calculate a ratio of the amount of light radiation of a predetermined wavelength range in the spectrum to at least one of total light radiation power density, total light radiation power intensity, and total light radiation energy of the spectrum according to the spectrum from the light detector.

Description

spectrometer

This invention relates to an optical metrology apparatus and, more particularly, to a spectrometer.

The eye is an important organ used by humans to perceive visual imaging and is called the "window of the soul." With the wide application of Light Emitting Diode (LED) related products, the influence of LED products on the eyes has been gradually paid attention to in the scientific and medical fields. After various studies, it is found that blue light and ultraviolet light, which are the main components of the LED light source, are one of the main causes of discomfort in the human eye or the human body.

In the spectrum obtained by splitting the white light LED light source, the energy in the wavelength range of blue light, ultraviolet light, etc. accounts for a large proportion. That is to say, long-term attention to the LED light source may cause the eyes to be exposed to high-energy blue light, ultraviolet light or other wavelengths of light, and there have been cases in which blue light causes damage to the human eye or various parts of the human body. For the above reasons, how to let the user evaluate the damage caused by the light emitted by the LED product to the human eye or various parts of the human body, and use the LED product to grasp the intensity of light, such as blue light, ultraviolet light or other wavelengths received by the eye. To properly control the frequency of use of LED products is a topic that needs to be studied at present.

Although the existing spectrometer can split a light to be measured to obtain a corresponding spectrum, the spectrum can only display the rough composition of the light of the light to be measured, and can not further focus on the blue, ultraviolet or other wavelengths of light that everyone pays attention to. The ratio of the proportion and the optical radiation power density provide information, so it is impossible to effectively measure the degree of damage or possibility of the light emitted by the LED to the human eye or various parts of the human body, or to evaluate the blue light touched by the eye when using the LED product, The intensity of ultraviolet light or other wavelengths of light.

The present invention provides a spectrometer that can be used to analyze the proportion of a particular band in the light to be measured, thereby allowing the user to thereby assess the degree of damage of the light to be measured to the human eye or various parts of the human body.

An embodiment of the invention provides a spectrometer for analyzing a light to be measured. The spectrometer includes a beam splitting unit, a photodetector and a processing unit. The beam splitting unit decomposes different wavelength components of the light to be measured. The photodetector detects the decomposed light to be measured to obtain a spectrum. The processing unit is electrically connected to the photodetector, and is configured to calculate a total optical radiation power density, a total optical radiation power intensity, and a total optical radiation power intensity of the spectrum in a specific frequency band according to a spectrum from the photodetector. A ratio of at least one of the total optical radiation energy, wherein the particular wavelength band falls within a wavelength band of visible light and invisible light from infrared light to ultraviolet light.

In an embodiment of the invention, the spectrometer further includes a display unit electrically connected to the processing unit. The processing unit is configured to command the display unit to display the spectrum A ratio of the amount of light radiation in a given wavelength band to at least one of a total optical radiation power density of the spectrum, a total optical radiation power intensity, and a total amount of light radiation.

In an embodiment of the invention, the processing unit commands the ratio of the amount of light radiation in the specific wavelength band to at least one of the total optical radiation power density, the total optical radiation power intensity, and the total optical radiation energy of the spectrum. The display unit correspondingly displays a message to provide information on whether the user's light to be measured is harmful to the human eye or the human body.

In an embodiment of the invention, the processing unit is configured to display the optical radiation power density of the light to be measured in a specific wavelength band according to the spectral command display unit from the photodetector.

In an embodiment of the invention, the processing unit instructs the display unit to display a message according to the optical radiation power density of the light to be measured in a specific frequency band, so as to provide information or harmfulness to the human eye or the human body whether the light to be measured is harmful to the human eye or the human body. Information.

In an embodiment of the invention, the processing unit is configured to calculate the optical radiation power density of the light to be measured in a specific wavelength band according to the spectrum from the photodetector.

In an embodiment of the invention, the photodetector is configured to detect the optical radiation power density of different wavelength components of the light to be measured.

In an embodiment of the invention, the photodetector is an image sensor.

In an embodiment of the invention, a user interface is further connected to the processing unit, wherein the user adjusts the range of the specific band by using the user interface.

In the spectrometer of the embodiment of the invention, the processing unit can be based on light The spectrum of the detector calculates a ratio of the amount of light radiation in the specific wavelength band to at least one of the total optical radiation power density, the total optical radiation power intensity, and the total optical radiation energy of the spectrum, so that the user can thereby Determine the degree or possibility of damage to the eye by the light source used, and appropriately control the frequency of use of the electronic product or light source to avoid eye discomfort and even prevent macular lesions or other eye diseases.

The above described features and advantages of the invention will be apparent from the following description.

50‧‧‧Measured light

100, 100a‧‧ ‧ spectrometer

110‧‧‧shell

120‧‧‧Into the aperture

130‧‧‧Distribution unit

140‧‧‧Photodetector

150‧‧‧Processing unit

160‧‧‧Display unit

170‧‧‧User interface

180‧‧‧External host

S1, S2‧‧‧ telecommunication number

1 is a schematic view of a spectrometer of a first embodiment of the present invention.

2 is a schematic diagram of a certain spectrum measured by the spectrometer of FIG. 1.

Figure 3 is a schematic illustration of a spectrometer of a second embodiment of the present invention.

(First Embodiment)

1 is a schematic view of a spectrometer of a first embodiment of the present invention. Referring to FIG. 1 , the spectrometer 100 of the present embodiment includes a beam splitting unit 130 , a photodetector 140 , and a processing unit 150 . In this embodiment, the spectrometer 100 can further include a housing 110, and the beam splitting unit 130, the photodetector 140, and the processing unit 150 are disposed in the housing 110.

When the light to be measured 50 is analyzed by the spectrometer 100 of the embodiment, the light to be detected 50 can be incident into the spectrometer 100 from the light entrance hole 120 on the outer casing 110, and The different wavelength components of the light to be measured 50 are decomposed via the beam splitting unit 130. In the present embodiment, the beam splitting unit 130 is, for example, a grating. However, in other embodiments, the beam splitting unit 130 may also be a spectroscope, a light filter, or other component that decomposes light at a particular wavelength.

The photodetector 140 detects the light to be measured 50 decomposed by the spectroscopic unit 130 and detects the optical radiation power density of different wavelength components of the light to be measured 50 to obtain a spectrum. In this embodiment, the photodetector 140 is an image sensor, such as a one-dimensional image sensor, wherein the one-dimensional image sensor is, for example, a charge coupled device (CCD) or a complementary gold oxide. Semiconductor (Complementary Metal Oxide Semiconductor, CMOS) sensor. The portions of the different wavelengths of the light to be measured 50 that are resolved by the light splitting unit 130 are irradiated to different positions on the photodetector 140. Therefore, the photodetector 140 can measure the optical radiation power corresponding to the different wavelength components of the light to be measured 50. Density, for example, illuminance, irradiance, and the like.

The photodetector 140 and the processing unit 150 are electrically connected, and the information of the spectrum obtained by the photodetector 140 is converted into the electrical signal S1 and transmitted to the processing unit 150. The processing unit 150 calculates, according to the spectrum from the photodetector 140, at least one of the total optical radiation power density, the total optical radiation power intensity, and the total optical radiation energy of the spectrum of the optical radiation in the specific wavelength band relative to the spectrum. proportion. The amount of light radiation is, for example, an optical radiation power density, an optical radiation power intensity, or a light radiation energy. In the present embodiment, the specific wavelength band falls within the wavelength band of visible light and invisible light from infrared light to ultraviolet light. For example, the information of the spectrum is present in the electrical signal S1, and the processing unit calculates the amount of light radiation in the specific wavelength band according to the electrical signal S1 relative to A ratio of at least one of a total optical radiation power density, a total optical radiation power intensity, and a total optical radiation energy of the spectrum.

2 is a schematic diagram of a certain spectrum measured by the spectrometer of FIG. 1. Please refer to FIG. 1 and FIG. 2 . The spectrum in FIG. 2 is taken as an example of the spectrum of the LED measured by analyzing the LED light source, and the light to be measured 50 is the light emitted by the LED, but the invention is not limited thereto. The spectrometer of an embodiment of the present invention can be used to measure a light source that any other user wants to measure, such as a fluorescent tube, an incandescent bulb, a halogen lamp, or the like. In Fig. 2, the horizontal axis of the spectrum is the wavelength of light (in nanometers), and the vertical axis is the optical radiation power density, such as illuminance, illuminance, etc., and the unit is, for example, lux. According to the spectrum shown in Fig. 2, the spectrum near the peak on the left side belongs to a specific wavelength band, that is, in the light emitted by the white LED light source, the energy of the specific wavelength band occupies a large proportion. The technique of the present invention for analyzing the light intensity of a specific wavelength band of the light to be measured 50 will be further explained below.

Specifically, after the electrical signal S1 of the spectrum of the light to be measured 50 is transmitted to the processing unit 150, the processing unit can calculate an integrated area from X1 nm to X2 nm under the spectral curve in FIG. 2 (this integrated area corresponds to the The amount of light radiation in a particular band), and the integrated area under the entire spectral curve is calculated (this integrated area corresponds to the total energy of the spectrum, and this integrated area is, for example, the integrated area in the visible light band). Then, the processing unit calculates the ratio of the two integrated areas to calculate at least the total optical radiation power density, the total optical radiation power intensity, and the total optical radiation energy of the optical radiation amount in the specific frequency band. The ratio of one.

Further, the spectrometer 100 of the present embodiment further includes a user interface 170. Make The user interface 170 is electrically connected to the processing unit 150, wherein the user can adjust the band range of X1 to X2 of the specific band by the user interface 170 so that the band range falls from visible light to ultraviolet light. Within the band of visible light.

In this embodiment, the processing unit 150 and the display unit 160 are electrically connected. After the processing unit 150 calculates the above energy ratio, the ratio is transmitted to the display unit 160 in the form of an electrical signal S2, wherein the electrical signal S2 is, for example, a display signal. That is, the processing unit 150 may instruct the display unit 160 to display a ratio of the amount of light radiation in a particular wavelength band relative to at least one of the total optical radiation power density, the total optical radiation power intensity, and the total optical radiation energy of the spectrum. In this way, the user can know the proportion of the light of the specific wavelength band in the light to be measured 50 via the display unit 160. The display unit 160 is, for example, a liquid crystal display, an organic light emitting diode display, an electrophoretic display, a light emitting diode display, or other suitable display.

In view of the fact that the user may not understand the meaning represented by the above ratio, for example, if the above ratio is a safe range, the processing unit 150 is also capable of total optical radiation relative to the spectrum according to the above-mentioned spectrum of the amount of light radiation in a specific wavelength band. The ratio of the power density, the total optical radiation power intensity, and the total optical radiation energy, the command display unit 160 correspondingly displays a message to provide information on whether the user's light to be measured 50 is harmful to the human eye or various parts of the human body. Or information about the degree of harmfulness. This message, for example, indicates that it is harmful or harmless, or shows a percentage of the degree of harmfulness, or divides the harmful to the harmless into several levels, which may include very harmful, slightly harmful, nearly harmless, completely harmless, and the like.

Compared with simply displaying the above energy ratio, the calculation of the processing unit 150 of the present embodiment and direct conversion into information that is harmful to the human eye or various parts of the human body or the degree of harmful information will help the user to evaluate the LED product or have The extent or possibility of damage to the human eye or various parts of the human body caused by light from other light sources can be avoided if the energy of a particular band of LED products or products with other light sources is found to exceed that of normal LED products or products with other light sources. Use such LED products or products with other light sources. In addition, the spectrometer of the embodiment can also provide a user with a quick understanding of the proportion of energy occupied by a specific band in the LED product used or a product having other light sources, thereby appropriately controlling the frequency of using the LED product or the product having other light sources. To avoid eye discomfort.

In this embodiment, the processing unit 150 may also calculate the optical radiation power density (eg, illuminance, irradiance, etc.) of the light to be measured 50 in a specific wavelength band according to the spectrum from the photodetector 140. Specifically, after the electrical signal S1 of the spectrum of the light to be measured 50 is transmitted to the processing unit 150, the processing unit analyzes the spectrum shown in FIG. 2, and integrates the area of X1 nm to X2 nm below the spectral curve. To obtain the optical radiation power density (eg, illuminance, irradiance, etc.) of a particular band.

After the processing unit 150 calculates the optical radiation power density, the optical radiation power density may be transmitted to the display unit 160 in the form of an electrical signal S2. That is, the processing unit 150 instructs the display unit 160 to display the optical radiation power density of the spectrum in a particular wavelength band. In this way, the user can know the optical radiation power density of a specific wavelength band in the light to be measured 50 via the display unit 160.

Furthermore, the processing unit 150 is further capable of being in the specific band according to the light to be measured 50. The optical radiation power density, outputting the electrical signal S2 to the display unit 160, the command display unit 160 correspondingly displays a message to provide information on whether the user's light to be measured 50 is harmful to the human eye or various parts of the human body.

In the present embodiment, the display unit 160 is disposed on the outer casing 110, and the spectrometer 100 is small in size and suitable for hand-held, so the spectrometer 100 is adapted to be carried by the user to facilitate judging the light source to the person in various occasions. The degree of damage to the eyes or parts of the body.

The processing unit 150 can implement the above functions by means of software, firmware or hardware. When the processing unit 150 is implemented in a software manner, the processing unit includes a processor (eg, a microprocessor), a random access memory electrically connected to the processor, and a storage unit electrically connected to the random access memory. (eg flash memory, read-only memory or hard drive). When the processing unit 150 is in operation, the program instructions (such as the code) in the storage unit are first loaded into the random access memory, and then the program instructions in the random access memory are loaded into the processor for processing. The above functions are performed. On the other hand, when the processing unit 150 is implemented in a hardware manner, the processing unit 150 may be a digital logic circuit. In addition, the spectrometer 100 of the embodiment can also be integrated into a mobile device (such as a smart phone, a tablet or a digital camera), and the processor is a central processing unit (CPU) of the mobile device, and the program instruction is action. The way the app is written is written.

In addition, there are many filter products on the market that can filter light sources such as blue light or other wavelengths, such as filters, but users cannot judge the effect. At this time, the processing unit 150 can be used to calculate the change of the amount of light radiation in a specific wavelength band. Degree, for example, the difference between the amount of light radiation of a specific wavelength band before the filter is subtracted from the amount of light radiation of the wavelength band after the filter is used, or the difference is divided by the filter before the filter is used. The ratio of the change in the amount of light radiation obtained by the amount of light radiation in the band.

In this way, the user can use the difference or the change ratio of the amount of the above-mentioned light radiation calculated by the processing unit 150 to detect the filtering effect of a filter product for a specific wavelength band, and can select a filter that is truly effective. Light products. In addition, in addition to the use of filters, there are other products that use other methods to reduce the amount of light radiation in a particular band, and the spectrometer 100 of this embodiment can also be used to test the effectiveness of such products.

(Second embodiment)

Although the display unit 160 can be disposed on the outer casing 110 as described above, the spectrometer 100 of the present invention can also perform message output and display via an external device without providing a display unit, as shown in FIG.

Figure 3 is a schematic illustration of a spectrometer of a second embodiment of the present invention. Referring to FIG. 3, the spectrometer 100a of the present embodiment is similar to the spectrometer 100 of FIG. 1, and the differences between the two are as follows. In this embodiment, the processing unit 150 can be electrically connected to an external host 180, and after the processing unit 150 calculates the optical radiation amount ratio or the optical radiation power density of the specific wavelength band of the light to be measured 50, the specific wavelength band is The optical radiation amount ratio or the optical radiation power density is transmitted to the external host 180 as the electrical signal S2, and the electrical signal S2 is, for example, a data signal. In addition, the external host 180 (for example, a computer) causes the light radiation amount ratio or the optical radiation power density of the specific wavelength band to be displayed on an external display unit (for example, a screen of a computer) not shown.

Similarly, the processing unit 150 can also command the external host 180 to display a message correspondingly to an external display unit (not shown) according to the light radiation amount ratio or the optical radiation power density of the specific wavelength band to provide 50 pairs of the user to be metered. Information that is harmful to the human eye or parts of the human body, or information about the degree of harmfulness.

In summary, in the spectrometer of the embodiment of the present invention, the processing unit can calculate the total optical radiation power density, total optical radiation of the optical radiation amount in the specific wavelength band relative to the spectrum according to the spectrum from the photodetector. a ratio of at least one of the power intensity and the total optical radiation energy, so that the user can determine the degree or possibility of damage to the eye by the light source used, and thereby appropriately control the frequency of use of the electronic product or the light source to avoid the eyes. Discomfort and even prevention of macular degeneration or other eye diseases.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and any one of ordinary skill in the art can make some changes and refinements without departing from the spirit and scope of the present invention. The scope of the invention is defined by the scope of the appended claims.

50‧‧‧Measured light

100‧‧‧ Spectrometer

110‧‧‧shell

120‧‧‧Into the aperture

130‧‧‧Distribution unit

140‧‧‧Photodetector

150‧‧‧Processing unit

160‧‧‧Display unit

170‧‧‧User interface

S1, S2‧‧‧ telecommunication number

Claims (10)

A spectrometer for analyzing a light to be measured, the spectrometer comprising: a spectroscopic unit that decomposes different wavelength components of the light to be measured; and a photodetector that detects the decomposed light to obtain a spectrum; a processing unit electrically connected to the photodetector and configured to calculate, according to the spectrum from the photodetector, a total optical radiation power density of the spectrum of the optical radiation in the specific wavelength band relative to the spectrum a ratio of at least one of a total optical radiation power intensity and a total optical radiation energy, wherein the specific wavelength band falls within a wavelength band of visible light and invisible light from infrared light to ultraviolet light. The spectrometer of claim 1, further comprising a display unit electrically connected to the processing unit, wherein the processing unit is configured to command the display unit to display the amount of light radiation of the spectrum in the specific wavelength band relative to A ratio of at least one of a total optical radiation power density, a total optical radiation power intensity, and a total optical radiation energy of the spectrum. The spectrometer of claim 2, wherein the processing unit is based on the total amount of optical radiation in the specific wavelength band relative to the total optical radiation power density, the total optical radiation power intensity, and the total optical radiation energy of the spectrum. At least one of the ratios commands the display unit to display a message corresponding to the information of the user whether the light to be measured is harmful to the human eye or the human body. The spectrometer of claim 2, wherein the processing unit is configured to display, according to the spectrum from the photodetector, the display unit to display an optical radiation power density of the light to be measured in the specific wavelength band. The spectrometer of claim 4, wherein the processing unit instructs the display unit to display a message according to the optical radiation power density of the light to be measured in the specific wavelength band to provide a user with the light to be measured to the human eye. Or information about whether the human body is harmful or harmful. The spectrometer of claim 1, wherein the processing unit is configured to calculate an optical radiation power density of the light to be measured in the specific wavelength band according to the spectrum from the photodetector. The spectrometer of claim 1, wherein the photodetector is configured to detect an optical radiation power density of different wavelength components of the light to be measured. The spectrometer of claim 1, wherein the photodetector is an image sensor. The spectrometer of claim 1, further comprising a user interface electrically connected to the processing unit, wherein the user adjusts the range of the specific band by the user interface. The spectrometer of claim 1, wherein the processing unit is configured to calculate a degree of change in the amount of light radiation in the specific wavelength band.