CN110887562A - Blue light detector and detection method thereof - Google Patents
Blue light detector and detection method thereof Download PDFInfo
- Publication number
- CN110887562A CN110887562A CN201911241676.9A CN201911241676A CN110887562A CN 110887562 A CN110887562 A CN 110887562A CN 201911241676 A CN201911241676 A CN 201911241676A CN 110887562 A CN110887562 A CN 110887562A
- Authority
- CN
- China
- Prior art keywords
- detector
- blue light
- detection
- current
- light source
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 71
- 239000012528 membrane Substances 0.000 claims abstract description 21
- 230000003321 amplification Effects 0.000 claims abstract description 20
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 20
- 230000000903 blocking effect Effects 0.000 claims description 8
- 238000000034 method Methods 0.000 claims 2
- 230000000149 penetrating effect Effects 0.000 claims 1
- 230000002265 prevention Effects 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 6
- 241000219739 Lens Species 0.000 description 16
- 230000005540 biological transmission Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 208000027418 Wounds and injury Diseases 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 208000014674 injury Diseases 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 210000001525 retina Anatomy 0.000 description 2
- 239000003053 toxin Substances 0.000 description 2
- 231100000765 toxin Toxicity 0.000 description 2
- 108700012359 toxins Proteins 0.000 description 2
- 206010057430 Retinal injury Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000003760 hair shine Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002207 retinal effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
- G01J1/4228—Photometry, e.g. photographic exposure meter using electric radiation detectors arrangements with two or more detectors, e.g. for sensitivity compensation
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Spectrometry And Color Measurement (AREA)
Abstract
The invention provides a blue light detector and a detection method thereof, belongs to the field of blue light detection devices, and provides the blue light detector and the detection method thereof, wherein the blue light detector can visually display the blue light prevention effect of a diaphragm through numerical values, and is simple in structure and convenient and fast to operate. In the invention, a first detector and a second detector are both connected with the input end of a control circuit, the control circuit is connected with a display screen, and a switch is connected between a power supply and the control circuit; the power supply is switched on, the first photoelectric detector and the second photoelectric detector respectively form reference current and detection current of the received blue light and transmit the reference current and the detection current to the amplification module, and the amplification module transmits the amplified reference current and the detection current before the amplified reference current and the detection current are put into the membrane to be detected to the operation module for operation so as to compensate the detection current; the amplifying module transmits the amplified reference current and the detection current which is put into the membrane to be detected to the operation module for operation, and outputs the blue light prevention effect of the membrane to the display screen for numerical value display. The invention is mainly used for blue light detection of the diaphragm.
Description
Technical Field
The invention belongs to the field of blue light detection devices, and particularly relates to a blue light detector and a detection method thereof.
Background
Short-wave blue light is light with relatively high energy at the wavelength of 400nm-480nm, particularly blue light in the wavelength range of 435nm-465nm, carries high energy, and when the short-wave blue light meets the body, the released energy can cause thermal injury and photochemical injury. When blue light enters the retina, the retina starts to capture optical particles to play a photosensitive function, because the energy carried by the blue light is larger, the retinal cells capturing excessive blue light optical particles start to die, so that the amount of toxins in a macular region in the eye is increased, and the toxins are accumulated for a long time, thereby causing retinal damage and further causing various fundus diseases. At present, for effectively preventing blue light, people generally adopt the mode such as directly wearing to prevent blue light glasses or carrying out pad pasting to displays and so on. When such products are produced, the effect of absorbing blue light can be detected by a spectrophotometer or a spectrometer, but the detection instruments are complex in equipment, require various auxiliary components and facilities, and require professional operation, so that the detection instruments are inconvenient to popularize and use. The mode of present commonly used detection blue light adopts the blue light pen to shine to the lens usually, and the wavelength of the blue light that the blue light pen sent is not the wavelength of the harmful shortwave blue light of eye, therefore, even the lens can block the blue light that shines out of present blue light pen, can not prove it can prevent the harmful blue light of eye yet, in addition, more importantly prevent blue light lens variety numerous on the market at present, the quality is uneven, price difference is huge, this kind of detection mode can only rely on the naked eye to judge whether the lens blocks blue light production, can not directly perceivedly discern the effect that blocks of lens to harmful blue light, can't distinguish the quality of present preventing blue light lens.
Patent document CN201721047785.3 discloses a blue light prevention device detection apparatus, which can detect blue light, but has the defects of complex structure and inconvenient operation. The internal circuit elements are more, the operation is complex, and the popularization is not facilitated.
Therefore, a blue light detector and a detection method thereof are needed, wherein the blue light prevention effect of the membrane can be accurately and visually detected, and the blue light detector is simple in structure and convenient to operate.
Disclosure of Invention
Aiming at the defects of complex structure and difficult operation of the existing blue light detector, the invention provides the blue light detector which can accurately and visually detect the blue light prevention effect of the membrane, has a simple structure and is convenient to operate and the detection method thereof.
The technical scheme of the blue light detector and the detection method thereof comprises the following steps:
the invention relates to a blue light detector which comprises a U-shaped shell, a first detector, a second detector, a control circuit, a display screen, a switch, a power supply, a membrane to be detected and a detection key, wherein the first detector is arranged on the left side of the U-shaped shell, the second detector is arranged on the right side of the U-shaped shell, the first detector and the second detector are arranged oppositely, the display screen and the switch are both arranged on the U-shaped shell, the control circuit and the power supply are both fixed in the U-shaped shell, the output ends of the first detector and the second detector are both connected with the input end of the control circuit, the output end of the control circuit is connected with the input end of the display screen, the switch is connected between the power supply and the control circuit, and the output end of the detection key is connected with the input end of the control.
Further: a detector includes blue light source, collimating lens, beam splitter prism, a photoelectric detector and L type shell, blue light source's input is connected with the output that detects the key, blue light source, collimating lens and beam splitter prism set gradually in one side of L type shell, a photoelectric detector sets up in the opposite side of L type shell, blue light source's light source passes collimating lens perpendicularly and reachs beam splitter prism, beam splitter prism falls into reference light and detection light with the light source that passes collimating lens, wherein, reference light is reflected to a photoelectric detector by beam splitter prism, detect light transmission beam splitter prism.
Further: the blue light source is a blue light source with the central wavelength of 440 nm.
Further: the second detector comprises a second photoelectric detector and a detector shell, the second photoelectric detector is vertically fixed inside the detector shell, and the detector shell is fixed on the right side of the U-shaped shell.
Further: the control circuit comprises an amplification module and an operation module, the output ends of the first detector and the second detector are connected with the input end of the amplification module, the output end of the amplification module is connected with the input end of the operation module, and the output end of the operation module is connected with the input end of the display screen.
A detection method based on the blue light detector comprises the following steps:
before a membrane to be detected is placed, a switch is pressed to be connected with a power supply, a blue light source emits blue light, a first photoelectric detector forms reference current from the received blue light and transmits the reference current to an amplification module, a second photoelectric detector forms detection current from the received blue light and transmits the detection current to the amplification module, the amplification module transmits the amplified reference current and detection current to an operation module for operation, and the detection current is compensated according to an operation result;
and step two, a membrane to be detected is placed between the first detector and the second detector, a detection key is pressed, the blue light source emits blue light, the reference current formed by the first photoelectric detector is unchanged, the second photoelectric detector forms detection current for transmitting the blue light passing through the membrane to be detected to the amplification module, the amplification module transmits the amplified reference current and detection current to the operation module for operation, and an operation result is output to the display screen.
Further: in the first step, the calculation formula of the compensation value is C-a-B, where C is the compensation value, a is the reference current output by the first photo-detector, and B is the detection current output by the second photo-detector.
Further: in the second step, after the diaphragm to be detected is placed, due to the blocking of the diaphragm to be detected to the blue light, the photocurrent generated by the second photoelectric detector is reduced to B ', and at this time, an operation formula of the operation module is used, where D is (C + B')/a, where D is a percentage of the intensity of the blocked transmitted blue light.
The blue light detector and the detection method thereof have the beneficial effects that:
the blue light detector and the detection method thereof have the advantages that through brand-new light path and structural design, the equipment structure is simple, the operation is simple and convenient, and the photoelectric detector can detect the intensity difference of light in specific wavelength ranges of different incident lights without other auxiliary components or facilities. The operation is convenient, technical personnel are not needed, the result is accurate, the measuring range is wide, and the popularization is convenient. The light intensity in a specific wavelength range can be directly detected, and the measurement precision is improved. In addition, the display can directly display corresponding numerical values, and the blocking effect of the blue light prevention film on harmful blue light can be directly displayed by the numerical values.
Drawings
FIG. 1 is a schematic structural diagram of a blue light detector;
FIG. 2 is a schematic structural diagram of a first detector;
FIG. 3 is a schematic structural diagram of a second detector;
FIG. 4 is a schematic view of the working principle before the diaphragm to be measured is placed;
FIG. 5 is a schematic view of the working principle after the diaphragm to be measured is placed;
the device comprises a U-shaped shell 1, a first detector 2, a blue light source 21, a collimating lens 22, a beam splitter 23, a first photoelectric detector 24, an L-shaped shell 25, a second detector 3, a second photoelectric detector 31, a detector shell 32, a control circuit 4, a display screen 5, a switch 6, a power supply 7, a membrane to be detected 8 and a detection key 9.
Detailed Description
The technical solutions of the present invention are further described below with reference to the following examples, but the present invention is not limited thereto, and any modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Example 1
The present embodiment is described with reference to fig. 1, fig. 2 and fig. 3, and in the present embodiment, the blue light detector related to the present embodiment includes a U-shaped housing 1, a first detector 2, a second detector 3, a control circuit 4, a display screen 5, a switch 6, a power supply 7, a membrane 8 to be detected and a detection key 9, the first detector 2 is disposed on the left side of the U-shaped housing 1, the second detector 3 is disposed on the right side of the U-shaped housing 1, the first detector 2 and the second detector 3 are disposed opposite to each other, the display screen 5 and the switch 6 are both disposed on the U-shaped housing 1, the control circuit 4 and the power supply 7 are both fixed inside the U-shaped housing 1, output ends of the first detector 2 and the second detector 3 are both connected to an input end of the control circuit 4, an output end of the control circuit 4 is connected to an input end of the display screen 5, the switch 6 is connected between the power supply, the output end of the detection key 9 is connected with the input end of the control circuit 4. The first detector 2 emits reference light, the second detector 3 receives the reference light to form detection light, and when the membrane 8 to be detected is not placed between the first detector 2 and the second detector 3, the control circuit 4 makes a difference between the reference light and the detection light in an initial state; when the membrane 8 to be detected is placed between the first detector 2 and the second detector 3, the detection key 9 is pressed, and the control circuit 4 displays the reference light in the initial state and the detection light which penetrates through the membrane 8 to be detected on the display screen 5 after calculation; and then the blocking effect of the film 8 to be measured on the blue light can be calculated.
More specifically: detector 2 includes blue light source 21, collimating lens 22, beam splitter prism 23, a photoelectric detector 24 and L type shell 25, blue light source 21's input is connected with the output that detects key 9, blue light source 21, collimating lens 22 and beam splitter prism 23 set gradually in one side of L type shell 25, photoelectric detector 24 sets up in the opposite side of L type shell 25, blue light source 21's light source passes collimating lens 22 perpendicularly and arrives beam splitter prism 23, beam splitter prism 23 will pass the light source of collimating lens 22 and divide into reference light and detection light, wherein, reference light is reflected to photoelectric detector 24 No. one by beam splitter prism 23, detection light sees through beam splitter prism 23. The blue light source 21 is a 440nm blue light source. Before the film 8 to be measured is not placed, a light source with a central wavelength of 440nm emitted by the blue light source 21 enters the beam splitter prism 23 through the collimating lens 22. The light beams split by the beam splitting prism 23 are respectively incident to the first photoelectric detector 24, the light intensity is converted into current or voltage through the first photoelectric detector 24, and the two paths of light intensity are collected through the control circuit 4.
More specifically: the second detector 3 comprises a second photoelectric detector 31 and a detector shell 32, the second photoelectric detector 31 is vertically fixed inside the detector shell 32, and the detector shell 32 is fixed on the right side of the U-shaped shell 1. The light intensity obtained by the first photodetector 24 is used as reference light, and the intensity value of the detection light received by the second photodetector 31 is compensated to reach the same value. After the film 8 to be measured is placed, since the light incident on the second photodetector 31 is reflected and absorbed, the light intensity obtained by the second photodetector 31 is reduced. The light intensity obtained by the second photoelectric detector 31 is compared with the reference light intensity transmitted through the first detector 24, so that the blocking capability of the film to be detected on the blue light with the central wavelength of 440nm can be obtained, and the digital display is directly carried out through the LCD display screen 5.
More specifically: the control circuit 4 comprises an amplifying module and an operation module, the output ends of the first detector 2 and the second detector 3 are connected with the input end of the amplifying module, the output end of the amplifying module is connected with the input end of the operation module, and the output end of the operation module is connected with the input end of the display screen 5.
Example 2
In this embodiment, a detection method based on the blue light detector according to this embodiment is described with reference to fig. 4 and 5 and embodiment 1, and includes the following steps:
before a membrane 8 to be detected is placed, a switch 6 is pressed to switch on a power supply 7, a blue light source 21 emits blue light, a first photoelectric detector 24 forms reference current for the received blue light and transmits the reference current to an amplification module, a second photoelectric detector 31 forms detection current for the received blue light and transmits the detection current to the amplification module, the amplification module transmits the amplified reference current and the amplified detection current to an operation module for operation, and the detection current is compensated according to an operation result;
step two, put into the diaphragm 8 that awaits measuring between first detector 2 and second detector 3, press detection key 9, blue light source 21 sends the blue light, the reference current that photoelectric detector 24 formed is unchangeable, photoelectric detector 31 will pass the blue light behind the diaphragm 8 that awaits measuring and form detection current transmission to the amplification module, the amplification module will be amplified reference current and detection current transmission to the operation module after carrying out the operation to export the operation result to display screen 5.
More specifically: in step one, the calculation formula of the compensation value is C-a-B, where C is the compensation value, a is the reference current output by the first photo-detector 24, and B is the detection current output by the second photo-detector 31.
More specifically: in the second step, after the diaphragm 8 to be measured is placed, due to the blocking of the diaphragm 8 to be measured on the blue light, the photocurrent generated by the second photodetector 31 is reduced to B ', and at this time, an operation formula of the operation module is used, where D is (C + B')/a, where D is a percentage of the blocked transmitted blue light. Before the blue-light-proof film to be tested is placed, after the power supply 7 is turned on, the first photo detector 24 and the second photo detector 31 receive the detection light emitted by the blue light source 21, and generate photocurrents respectively, for example, the current of the first photo detector 24 is 0.045mA, and the current of the second photo detector 31 is 0.040 mA. And calculating the difference value of the currents obtained by the two photodetectors by using an operation module to compensate an error C caused by the device difference, wherein if the current output by the first photodetector 24 is A and the current output by the second photodetector 31 is B, the value of C-A-B is 0.045-0.040-0.005 mA. After the film 8 to be measured is put in, the current generated by the second photodetector 31 is reduced to B ' due to the blocking of the blue light by the film 8 to be measured, for example, B ' is 0.020mA, while the photocurrent of the detector a is unchanged, a is 0.045mA, at this time, the measured current value is calculated by the calculation module, and the ratio D of the transmitted blue light is obtained, where D is (C + B ')/a is (0.005+0.020)/0.045 is 55.56%; 55.56% is displayed by the LCD display screen 5, which shows that the blue light intensity is reduced to 55.56% after passing through the membrane 8 to be detected, and the blocking effect of the blue light prevention membrane on harmful blue light can be intuitively obtained.
Claims (8)
1. A blue light detector is characterized by comprising a U-shaped shell (1), a first detector (2), a second detector (3), a control circuit (4), a display screen (5), a switch (6), a power supply (7), a membrane (8) to be detected and a detection key (9), wherein the first detector (2) is arranged on the left side of the U-shaped shell (1), the second detector (3) is arranged on the right side of the U-shaped shell (1), the first detector (2) and the second detector (3) are oppositely arranged, the display screen (5) and the switch (6) are both arranged on the U-shaped shell (1), the control circuit (4) and the power supply (7) are both fixed inside the U-shaped shell (1), the output ends of the first detector (2) and the second detector (3) are both connected with the input end of the control circuit (4), the output end of the control circuit (4) is connected with the input end of the display screen (5), the switch (6) is connected between the power supply (7) and the control circuit (4), and the output end of the detection key (9) is connected with the input end of the control circuit (4).
2. The blue light detector according to claim 1, wherein the first detector (2) comprises a blue light source (21), a collimating lens (22), a beam splitter prism (23), a first photodetector (24) and an L-shaped housing (25), the input end of the blue light source (21) is connected with the output end of the detection key (9), the blue light source (21), the collimating lens (22) and the beam splitter prism (23) are sequentially arranged on one side of the L-shaped housing (25), the first photodetector (24) is arranged on the other side of the L-shaped housing (25), the light source of the blue light source (21) vertically penetrates through the collimating lens (22) to reach the beam splitter prism (23), the beam splitter prism (23) divides the light source penetrating through the collimating lens (22) into reference light and detection light, wherein the reference light is reflected to the first photodetector (24) by the beam splitter prism (23), the detection light is transmitted through the spectroscope (23).
3. The blue light detector according to claim 2, wherein the second detector (3) comprises a second photodetector (31) and a detector housing (32), the second photodetector (31) is vertically fixed inside the detector housing (32), and the detector housing (32) is fixed on the right side of the U-shaped shell (1).
4. The blue light detector according to claim 3, wherein the control circuit (4) comprises an amplifying module and an operation module, the output ends of the first detector (2) and the second detector (3) are connected with the input end of the amplifying module, the output end of the amplifying module is connected with the input end of the operation module, and the output end of the operation module is connected with the input end of the display screen (5).
5. A blue light detector according to claim 4, characterized in that the blue light source (21) is a blue light source with a central wavelength of 440 nm.
6. The detection method of the blue light detector based on claim 4 is characterized by comprising the following steps:
before a membrane (8) to be detected is placed, a switch (6) is pressed to switch on a power supply (7), a blue light source (21) emits blue light, a first photoelectric detector (24) forms reference current for the received blue light and transmits the reference current to an amplification module, a second photoelectric detector (31) forms detection current for the received blue light and transmits the detection current to the amplification module, the amplification module transmits the amplified reference current and the amplified detection current to an operation module for operation, and the detection current is compensated according to an operation result;
and secondly, a membrane (8) to be detected is placed between the first detector (2) and the second detector (3), a detection key (9) is pressed, the blue light source (21) emits blue light, the reference current formed by the first photoelectric detector (24) is unchanged, the second photoelectric detector (31) transmits the blue light passing through the membrane (8) to be detected to an amplification module to form detection current, the detection current and the detection current are transmitted to an operation module by the amplification module to be operated, and the operation result is output to a display screen (5).
7. The method of claim 6, wherein in the first step, the compensation value is calculated as C-a-B, where C is the compensation value, a is the reference current output by the first photo-detector (24), and B is the detection current output by the second photo-detector (31).
8. The method for detecting blue light in a blue light detector according to claim 7, wherein in step two, after the diaphragm (8) to be detected is placed, the photocurrent generated by the second photodetector (31) is reduced to B 'due to the blocking of blue light by the diaphragm (8) to be detected, and at this time, the operational formula using the operational module is (D ═ C + B')/a, where D is the percentage of the intensity of the blocked transmitted blue light.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911241676.9A CN110887562A (en) | 2019-12-06 | 2019-12-06 | Blue light detector and detection method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911241676.9A CN110887562A (en) | 2019-12-06 | 2019-12-06 | Blue light detector and detection method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110887562A true CN110887562A (en) | 2020-03-17 |
Family
ID=69750837
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911241676.9A Pending CN110887562A (en) | 2019-12-06 | 2019-12-06 | Blue light detector and detection method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110887562A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1570586A (en) * | 2004-04-30 | 2005-01-26 | 宁波大学 | Automatic detecting device for spike filter |
| CN206756431U (en) * | 2017-06-11 | 2017-12-15 | 章德昌 | A kind of detection means for the processing of smart mobile phone screen |
| CN207992058U (en) * | 2018-03-14 | 2018-10-19 | 深圳市港瑞达科技有限公司 | A kind of release film surface quality detection device |
| JP2019105582A (en) * | 2017-12-14 | 2019-06-27 | 株式会社レクザム | Lens meter |
-
2019
- 2019-12-06 CN CN201911241676.9A patent/CN110887562A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1570586A (en) * | 2004-04-30 | 2005-01-26 | 宁波大学 | Automatic detecting device for spike filter |
| CN206756431U (en) * | 2017-06-11 | 2017-12-15 | 章德昌 | A kind of detection means for the processing of smart mobile phone screen |
| JP2019105582A (en) * | 2017-12-14 | 2019-06-27 | 株式会社レクザム | Lens meter |
| CN207992058U (en) * | 2018-03-14 | 2018-10-19 | 深圳市港瑞达科技有限公司 | A kind of release film surface quality detection device |
Non-Patent Citations (1)
| Title |
|---|
| 李景镇: "《光学手册》", 31 May 1986 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103439232A (en) | Obscuration type soot particle concentration measuring method and device thereof | |
| CN105953739A (en) | Transverse deformation measuring system and method based on laser irradiation intensity variation | |
| CN113834789B (en) | Multi-channel heavy metal detection device and detection method | |
| CN102243102B (en) | Photoelectric measuring device capable of measuring power and wavelength at same time | |
| CN105137201B (en) | A kind of optical fiber insulator insertion loss detector | |
| CN203278834U (en) | Light channel performance monitoring module capable of measuring channel central wavelength | |
| KR20020073255A (en) | Method for measuring light transmittance and apparatus therefor | |
| CN103134768A (en) | Portable special gutter oil detection system based on near infrared spectral technology | |
| CN202066590U (en) | Laser power detecting apparatus | |
| CN102445325A (en) | Device and method for measuring shade number of automatic darkening welding filter | |
| CN110887562A (en) | Blue light detector and detection method thereof | |
| JPH01124745A (en) | Light transmittance meter | |
| Ghazi-Bellouati et al. | Radiometric reference for weak radiations: comparison of methods | |
| CN102331298A (en) | Photometry device | |
| CN107192715B (en) | Novel cigarette machine tipping paper connects detects device | |
| CN108337046B (en) | FTTx terminal line tester | |
| CN209745527U (en) | passive optical device spectrum scanning device with ultrahigh wavelength resolution | |
| CN203324176U (en) | Portable special illegal cooking oil detection system based on near infrared spectrum technology | |
| CN110082075B (en) | Ultra-high wavelength resolution passive optical device spectrum scanning device and method | |
| CN108055074B (en) | Optical power detection circuit for optical switching device | |
| CN102607818B (en) | Device and method for measuring extinction ratio | |
| CN105699329A (en) | Wavelength scanning spectrum gas detection system and method based on double optical fiber annular cavities | |
| CN202854439U (en) | Lcd transmittance testing device | |
| CN106017304B (en) | A kind of He-Ne laser sensor for Michelson's interferometer | |
| CN221976293U (en) | Large dynamic range radiation temperature measurement system based on optical lens |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20200317 |