55results about How to "Change the angle of incidence" patented technology

The invention relates to a free toroidal lens arranged in the irradiation direction of the lamp LED which takes the high power LED encapsulated by single-chip or poly-chip as light source. When the LED lights, the light illuminates from the free toroidal lens. The free toroidal lens can alter the irradiation direction by refracting the light from the LED so as to alter the LED lamp irradiation angle, range and light distribution. The preset light distribution effect is achieved after the light emitted from the LED passes through the free toroidal lens based on the refraction action of the free toroidal lens with different preset incident angles, different shapes and curvatures of the light incidence plane and the light emergence plane.

A laser and a laser radar, the laser comprises: a pump unit, a gain unit, a Q-switching unit and a light splitting unit arranged in sequence along an optical axis; the pump unit generates pump light; the gain unit includes a gain medium; the The Q-switching unit includes a saturable absorber; the light splitting unit generates outgoing laser light and a plurality of tuned lights of different wavelengths; a resonant reflection surface and a scanning unit, the resonant reflection surface is located between the gain unit and the pump unit , the scanning unit is located on the optical path of the plurality of tuned lights, and the scanning unit selects one from the plurality of tuned lights and returns the selected tuned light according to the original optical path. The laser is a tunable laser that can realize Q-switching, can obtain higher peak power and greater pulse energy, and can effectively shorten the cavity length and volume of the resonator cavity, which is conducive to the realization of high integration and high peak power. Consideration of value power.

The invention provides a laser device and a laser radar. The laser device comprises a pump unit, a gain unit, a Q-switching unit, and a beam splitting unit disposed in sequence along an optical axis.The pump unit generates pump light. The gain unit includes a gain medium. The Q-switching unit includes a saturable absorber. The beam splitting unit generates exiting laser and a plurality of tuninglight of different wavelengths. The laser device also comprises a resonant reflecting surface and a scanning unit, the resonant reflecting surface is located between the gain unit and the pump unit, and the scanning unit selects one piece of tuning light from the plurality of tuning light and returns the selected tuning light according to an original optical path. The laser device is a tunable laser device capable of realizing Q-switching, higher peak power and larger pulse energy can be obtained, the cavity length of a resonant cavity and the volume of the resonant cavity can be effectively reduced, and the realization of the consideration of both high integration and high peak power is facilitated.

The invention discloses a three-dimensional super resolution microscopic imaging method and a device based on variable angle total internal reflection structured light illumination. An illumination beam is split to two paths of incident light with the consistent polarization directions and with total reflection happening, generated evanescent waves interfere to form a total internal reflection structured light illumination sample, fluorescence signals emitted by the sample are gathered to obtain a total internal reflection structured light illumination original image, and a transversal super resolution image is reconstructed. Total internal reflection of a single path of incident light on the surface of the imaging sample is used, the incidence angle and the azimuth angle of the incident light are changed one by one to scan the sample, the fluorescence signals emitted by the sample are gathered to obtain a variable-incidence angle variable-azimuth angle total internal reflection structured light illumination original image; and the variable-incidence angle variable-azimuth angle total internal reflection structured light illumination original image is preprocessed to reconstruct anaxial super resolution image of the sample, and in combination of the transversal super resolution image, a three-dimensional super resolution image is reconstructed.

The invention relates to a rotating-mirror Fourier interference imaging spectrometer, which is characterized in that the rotating-mirror Fourier interference imaging spectrometer sequentially consists of a front telescope imaging system, an entrance slit, a collimator, a Sagnac spectrometer, a re-imaging Fourier lens and a flat-panel detector along a laser incident light path, wherein the Sagnac spectrometer consists of a first total-reflection mirror, a second total-reflection mirror and a semitransparent half-reflection mirror, the semitransparent half-reflection mirror and an incident light beam form a 45-degree included angle, the semitransparent half-reflection mirror is provided with a rotating mechanism for changing the incident angle of the incident light beam, the positions of the first total-reflection mirror and the second total-reflection mirror are fixed, the entrance slit is arranged on the focus of the front telescope imaging system, the re-imaging Fourier lens is arranged in the direction of the output light of the Sagnac spectrometer, and the flat-panel detector is arranged in the image plane of the re-imaging Fourier lens. By using the rotating-mirror Fourier interference imaging spectrometer, the spatial information and the spectral information of a detected object can be obtained. The rotating-mirror Fourier interference imaging spectrometer has the characteristics of compact structure and miniaturization. Moreover, the application scope of the Fourier interference imaging spectrometer is expanded.

The invention discloses a method for producing a multilayer film blazed grating based on electron beam lithography and X-ray exposure, comprising the following steps: producing an X-ray exposure mask by using electron beam direct writing, forming a blazed grating graphic on a negative photoresist by using contact exposure, then growing a multilayer film on the graphic to form the multilayer film blazed grating. According to the invention, the defects of low electron beam efficiency and difficult production of blaze angles are overcome, the graphic output capacity of the electron beam and the advantages of high resolution and high efficiency of the X-ray are combined; the X-ray incident angle is changed by adjusting the direction of the exposure fixture through the contact exposure, the growth of the blazed grating graphic is complete, and then the production of the multilayer film blazed grating is realized by growing the multilayer film.

The invention provides a tantalum ring and a preparation method thereof, a sputtering device comprising the tantalum ring and an application thereof. The tantalum ring comprises a ring part and patterns arranged on the surface of the ring part, and the patterns are in a conical pit shape, the conical pit-shaped patterns have a large specific surface area, when the conical pit-shaped patterns are applied to a sputtering process, a large amount of sputtering source can be attached on the conical pit-shaped patterns, and a better adhesion force is provided; in addition, the patterns present a conical pit shape, the tops of the conical pits face the interior of the ring part, the bottoms of every two adjacent conical pits are connected, a plane-shaped structure is presented but not a structurewith a pointed end, therefore, the phenomenon of point discharge occurring in a power-on process can be avoided, so that the service life of the tantalum ring is prolonged. The preparation method ofthe tantalum ring is simple, only the knurling treatment is needed, surface sharpening treatment is not needed, and it is ensured that on the premise that the obtained tantalum ring has better adsorption power and adsorption capacity on the sputtering source, and the situation of the point discharge is avoided as well.

The invention discloses a single-fiber bidirectional receiving and sending device based on pentagonal prism and interference filter, belonging to the technical field of optical fiber communication. The single-fiber bidirectional receiving and sending device comprises a laser transmitter, a laser detector, an optical fiber component and the pentagonal prism, wherein the pentagonal prism comprises afirst side face, a second side face and a third side face arranged corresponding to each part above, and a fourth side face used for performing total reflection for a light beam, wherein the first side face is provided with the filter. In the device provided by the invention, the pentagonal prism is added in an optical path, thus, optical path of incident light is changed before entering into thefilter, an incident angle (5-30 degrees) of the incident light is changed, and polarization dependent loss of a system is reduced; meanwhile, an included angle Beta between the first side face I andthe fourth side face IV is designed suitably, thus, the second beam of output light is perpendicular to the incident light, which meets a standard of an optical transceiver. The device provided by theinvention enables each index of such structure product to meet requirements under the premise of guaranteeing size, and improves functions of the transceiver.

The invention relates to the technical field of spectrum detection, and particularly relates to a device and a method for detecting the content of protein in tomato leaves by multi-angle in situ spectrum for tomato planting. The device comprises a spectrum probe and a light source, and further comprises an all-dimensional gyroscope and a light insulating device, wherein the all-dimensional gyroscope consists of an arc-shaped suspension plate, a circular ring track plate, an electric-driven roller and landing legs. The method comprises the following steps: (a) preparing for equipment; (b) correcting a spectrum white board; (c) automatically adjusting and sampling an angle of a leaf spectrum; (d), multi-sampling the leaf spectrum; and (e) calculating a physicochemical value. The device is arranged in a tomato planting field, and can obtain spectrum data of the content of the protein in the alive tomato leaves. The tomato leaves can be measured from multiple angles in an all-dimensional manner; the electric-driven roller automatically rotates, and meanwhile, a camera is matched for performing observation monitoring, so that the detection efficiency is high.

The invention discloses a detection apparatus utilizing surface plasma resonance (SPR) effect. The detection apparatus comprises a flexible connecting rod platform, a light source set, a triple prism, a metal film and a light detection unit. A free end of an input rod of the flexible connecting rod platform is suitable for linear movements, such that an output rod is driven to rotate. The light source set rotates with the output rod, such that an incidence angle of a polarized light from the light source radiated on the triple prism is changed. The metal film is arranged on the lower surface of the triple prism. The object requiring detecting is arranged on a metal film surface which does not contact the triple prism. The polarized light is radiated to the metal film through the triple prism, and is reflected by the metal film. The light detection unit is used for detecting a light intensity of an emergent light of the polarized light reflected by the metal film through the triple prism. When the detected light intensity is zero, the incidence angle of the polarized light is the resonance angle of the object requiring detection.

The invention relates to a reflection type adjustable ultrasonic probe, comprising a piezoelectric probe, a wedge block and a coupling agent, wherein a square groove is formed on the upper end face of the wedge block, the bottom surface of the square groove is a cambered surface, the coupling agent is placed in the square groove, the end part of the piezoelectric probe stretches into the coupling agent, the piezoelectric probe is rotationally connected with the wedge block, the piezoelectric probe comprises a shell, and a protective film, a piezoelectric wafer, a damping block, a cable and a joint, which are arranged in the shell in sequence, the protective film is arranged at the end opening of the shell, the piezoelectric wafer is correspondingly arranged above the protective film, the damping block is correspondingly arranged above the piezoelectric wafer, the joint is arranged in the middle of the top end of the shell, and the two ends of the cable are electrically connected with the piezoelectric wafer and the joint, respectively. The reflection type adjustable ultrasonic probe can be used for changing the incidence angle of ultrasonic wave by adjusting the inclination angle of the piezoelectric probe, so that the adaptation range of the probe is expanded.

The invention relates to the technical field of organic light emitting display, particularly relates to an OLED device and a manufacturing method thereof, and a display apparatus. The OLED device comprises a positive electrode, a negative electrode and at least two organic light emitting layers arranged between the positive electrode and the negative electrode; a charge generation layer is arranged between two adjacent organic light emitting layers; and a micro structure is arranged on at least one of the two surfaces, adjacent to the two organic light emitting layers, of the charge generationlayer. By virtue of the scheme provided by the invention, the contact area between the charge generation layer and an adjacent functional layer is enlarged, and the effective areas of the generated charges and injected charges of the charge generation layer are enlarged, so that charge generation and transmission capability of the charge generation layer is further improved, and the working voltage of the device is lowered effectively.

In a reflective liquid crystal display device according to the present invention, the breakdown phenomenon in long-term driving due to the asymmetric structure of the groove side surfaces between pixels can be avoided, and the reliability of long-term driving can be obtained. In the thickness direction, on the first side of the inter-pixel groove on the cross-section of the pixel electrode substrate, a first oblique vapor deposition alignment film is formed by vapor deposition, and on the second side facing the first side, a first oblique vapor deposition alignment film is formed by vapor deposition. The second oblique vapor deposition alignment film. Thereby, the film structure of the two sides of the inter-pixel groove in cross-section becomes symmetrical, so that the breakdown phenomenon in long-term driving due to the asymmetric structure of the side of the inter-pixel groove can be avoided.

The invention relates to a method for microscopically examining a sample (5). The method includes the steps: bringing the sample (5) into contact with an optically transparent medium (12) which has a higher refraction index than the sample (5), generating an illumination light beam (13), and guiding the illumination light beam (13) through an illumination lens (1) which focuses the illumination light beam. Subsequently, the deflecting of the illumination light beam (13) is carried out in the direction of the sample (5) to be examined using a deflection means arranged on a detection lens (2), in such a way that the illumination light beam hits an interface (10) between the optically transparent medium (12) and the sample (5) and is there completely reflected for evanescent illumination of the sample (5). Finally, detection is carried out of the fluorescent light emitted by the sample (5) and passing through the detection lens (2).

The invention relates to the technical field of spectrum detection, and especially relates to a spectrum apparatus for detecting the activity and the content of peroxidase in tomato leaves, in the tomato planting field, and a method thereof. The apparatus comprises a spectrum probe, a light source, an omnibearing gyroscope and a light insulation device, and the omnibearing gyroscope comprises an arc suspension plate, an annular track plate, electric driving rollers and supporting legs. The method comprises the following steps: 1, preparing the apparatus; 2, carrying out spectrum blank correction; 3, carrying out automatic spectral angle adjustment sampling on the leaves; 4, carrying out multi-point sampling on the spectrum of the leaves; and 5, calculating physical and chemical values. The apparatus is arranged in the tomato planting field to obtain the spectrum data of the activity of the peroxidase in the tomato leaves of living plants; the apparatus can measure the tomato leaves in an omnibearing multi-angle manner; and the electric driving roller automatically rotates, and a camera cooperates to observe and monitor, so the detection efficiency is high.

The invention discloses a vertical cavity surface emitting laser and a manufacture method thereof, and belongs to the technical field of semiconductors. The vertical cavity surface emitting laser includes a substrate, a lower reflective layer, a light emitting region, an upper reflective layer, an upper metal electrode, and a lower metal electrode. The lower reflective layer, the light emitting region, the upper reflective layer, and the upper metal electrode are sequentially laminated on the first surface of the substrate, the lower metal electrode is arranged on the second surface of the substrate that is opposite to the first surface of the substrate. The lower reflective layer adopts a GaAs / AlAs superlattice structure or an AlGaAs / AlGaAs superlattice structure, and at least one layer of Ag island structure in an array distribution is inserted in the lower reflective layer. When the Ag island structure has two or more layers, the multiple layers of Ag island structures are insertedin the lower reflective layer at intervals. The vertical cavity surface emitting laser of the invention can improve the luminous efficiency.

The invention relates to a plain butt weld detection system based on a dual-path converged adjustable light path. The plain butt weld detection system comprises an imaging device and an image controller, wherein the image controller is connected with the imaging device; two light source generation devices are symmetrically arranged on both sides of the imaging device, can rotate at a certain angle with a vertical direction; light rays emitted from the light source generation devices pass through a detected plate to enter the imaging device, the imaging device transmits an image to the image controller, and the image controller processes the received image to obtain a high-definition weld detection image. The detection system disclosed by the invention realizes the detection illumination of a plain butt weld by utilizing the dual-path converged light path, thereby enhancing the illumination intensity and eliminating the influence of a shadow generated through a single-path light irradiation weld on the detection of a weld position; the light path is changed by adjusting the angles of the light sources and the adjustment of the optimal incident angle of the light path before convergence can be realized, so that the weld illumination of different positions can be realized and an clearly imaged weld image is obtained.

The invention discloses a broadband periodic wave-absorbing structure based on a magnetic substrate, and belongs to the technical field of electronic materials. The broadband periodic wave-absorbing structure comprises an upper magnetic material layer, a lower magnetic material layer and a resistive film periodic layer arranged on a support of the two magnetic material layers to form a wave-absorbing body, wherein the upper magnetic material layer and the lower magnetic material layer are both flexible magnetic wave-absorbing rubber plates, and the dielectric constant and the magnetic conductivity of the upper magnetic material layer are both lower than those of the lower magnetic material layer. According to the broadband periodic wave-absorbing structure based on the magnetic substrate,the low-frequency broadband wave-absorbing effect is improved while the broadband wave-absorbing material is thinned. And the structure and the preparation process are simple, so that the manufacturing cost is low, and the operability is high.

The invention discloses a tiny butt weld detection system of a binocular two-way convergence adjustable optical path, comprising an image controller, and a first imaging device and a second imaging device which are connected with the image controller. The first imaging device and the second imaging device are arranged at the two sides of the image controller. A first light source generation device is arranged at one side of the first imaging device, and a second light source generation device is arranged at one side of the second imaging device. The first imaging device rotates an angle of alpha relative to the vertical direction, the second imaging device rotates an angle of beta relative to the vertical direction, the first light source generation device rotates an angle of gamma relative to the vertical direction, and the second light source generation device rotates an angle of delta relative to the vertical direction. By adopting the detection system, the light intensity can be increased and made uniform, and gap feature extraction error caused by shadow produced by lighting of a single light source can be eliminated. By adjusting the inclination angles of two light sources at the two sides, the incident angle of light can be changed, and welds in different positions can be detected.

The invention provides an external cavity feedback spectrum combining device capable of adjusting output beam spectral width. The device includes a concave spherical mirror capable of rotating about the spherical center and a convex spherical mirror fixed in position, wherein the concave spherical mirror is used for reflecting and gathering incident parallel beams to the convex spherical mirror, the convex spherical mirror is used for reflecting and collimating the incident parallel beams reflected and gathered by the concave spherical mirror to form parallel light output, focal points of theconcave spherical mirror and the convex spherical mirror coincide, the curvature radius R of the concave spherical mirror is larger than the curvature radius r of the convex spherical mirror, and a spherical center interval of the concave spherical mirror and the convex spherical mirror is (R-r) / 2. The device is advantaged in that a limitation that a conventional lens and prism shaping have a certain divergence effect on different frequency beams is solved.

The embodiment of the invention belongs to the technical field of laser marking, and relates to a laser marking device. The laser marking device comprises a laser marking machine and a mounting frame,wherein the mounting frame comprises a mounting column and a rotating arm, a laser head of the laser marking machine is located at one end of the rotating arm, and the rotating arm can drives the laser head to conduct rotating movement along a vertical face based on the mounting column. According to the scheme provided by the embodiment of the invention, by changing the cross arm part of a mounting frame of a laser head in the prior art from an original fixed invariant part to the rotatable rotating arm, the incidence angle of a laser is changed accordingly, under the condition that the costis saved, the outer surface of a to-be-marked product can be marked, the inner surface of the to-be-marked product can also be marked, and the marking range is expanded. The invention further providesa laser marking method and a storage medium for the laser marking device.

The embodiment of the invention provides a photovoltaic module, a photovoltaic power generation device and an incident angle adjustment method of the photovoltaic module. The photovoltaic module comprises a support, a first photovoltaic panel, at least one second photovoltaic panel and a reflecting panel, wherein the first photovoltaic panel, the second photovoltaic panel and the reflecting panelall are connected to the support, the first photovoltaic panel is used for generating power by sunlight which is received and directly irradiates, and the second photovoltaic panel is used for generating power by the received sunlight reflected by the reflecting panel. The first photovoltaic panel and the second photovoltaic panel are connected to the support and both can be used for generating power, and thus, an output power of a single photovoltaic support of a photovoltaic power station can be improved.

The invention provides a light-emitting device and an image sensor. The light-emitting device comprises a first light source and a first light guiding part, wherein the first light guiding part is arranged at the position of a light outlet of the first light source in an adjustable angle mode to change a light outlet angle of the first light guiding part. Due to the fact that the angle between the first light guiding part and the first light source is adjustable, an outgoing angle of light of the first light source can be changed through changes of the included angle between the first light guiding part and the first light source so as to change an incoming angle of light which lights on an image, and the light-emitting device can be used for identifying a false proof mark which is made of optically variable ink and the hologram image. Meanwhile, the light-emitting device has the advantages of being simple in structure and low in manufacturing cost.

The invention relates to the technical field of spectrum detection and particularly relates to a detecting device and method for the chlorophyll content of field maize plant leaves. The detecting device comprises a suspension device, an electrically-driven trolley and a data processing module, wherein the suspension device is composed of a right-angled stretching arm, a universal joint and a curved knife suspension arm; the electrically-driven trolley is composed of a frame, a power supply device, wheels and a miniature direct-current motor; the data processing module is arranged on a vertical rod in the front of the frame; and the suspension device is connected with the electrically-driven trolley through a connecting rod. The detecting method comprises the steps of (a) preparing equipment; (b) correcting a white spectroscopic plate; (c) regulating a spectrum acquiring angle; and (d) calculating a rationalized value. According to the detecting device and method, field detection is adopted, laboratory detection is not needed, and therefore, the detection efficiency is high; the maize leaves can be comprehensively detected; the optimal detecting angle can be obtained according to the natural growth habits of different maize leaves; the spectroscopic data of the positive and negative sides of the leaves can be acquired; and the whole device is simple and practical, low in cost and easy to popularize.

The invention relates to an optical path micro-adjustment device. The device comprises at least one optical adjustment plate and an adjustment cap for supporting the optical adjustment plate, wherein the optical adjustment plate is a cuboid or a wedge-shaped body; and the adjustment cap is semispherical. An optical path micro-adjustment method comprises the following steps of: when the device is used for micro-adjustment of an optical path, placing the adjustment cap in a semispherical groove, and placing the optical adjustment plate at an optical path transmission position; operating the adjustment cap to ensure that the optical path micro-adjustment device is swung back and forth and rotated right and left; changing the angle between light rays and the incident surface of the optical adjustment plate; refracting the optical path through the optical adjustment plate by using a large-adjustment and small-variation effect of an optical lever to ensure that the optical path is changed in the XY direction; and when the optical path reaches an appropriate position, fixing the adjustment cap and the groove. By the device and the method, the problems of low adjustment accuracy of the optical path and difficulty in maintenance of the adjusted optical path are effectively solved; when a laser is coupled to an optical path adjustment process of optical fibers / waveguides, the device and the method have extremely high accuracy requirements on XY; and the optical path is extremely accurately adjusted finely by using the optical path micro-adjustment device.

The invention relates to the technical field of spectrum detection, and particularly relates to a spectrum device and a method for detecting the activity content of superoxide dismutase of tomato leaves in a tomato planting field. The device comprises a spectral probe, a light source, an omnibearing rotator and a light insulation device, wherein the omnibearing rotator comprises an arc suspending plate, an annular rail plate, an electric driving roller and supporting pins. The method comprises the following steps: (a) preparing equipment; (b) correcting a spectral whiteboard; (c) automatically adjusting and sampling the angle of leaf spectrum; (d) sampling multiple spots of the leaf spectrum; and (e) calculating the physical and chemical value. The device is arranged in the tomato planting field so as to acquire the spectral data of the activity of living superoxide dismutase of tomato leaves; the tomato leaves can be detected in an omnibearing manner; and the electric driving roller automatically rotates, and a camera is simultaneously matched for observing and monitoring, so that the detection efficiency is high.

The invention relates to the technical field of hair nursing and treatment, and discloses a helmet capable of promoting hair growth and beautifying hair. The helmet comprises a helmet housing, wherein a lattice laser is arranged on the inner wall of the helmet housing; one or more moving assemblies for moving light rays are arranged in the helmet housing, and are used for moving the light rays to enable point radiation to become surface radiation; a plurality of laser points are transmitted to scalp in a helmet body through the lattice laser; and the moving assemblies are used for moving the laser points, and the laser points move on the scalp, so that the surface radiation is realized, and the effect of performing uniform illuminating on the scalp of a user for uniformly promoting hair growth is achieved.

The invention discloses a quick glue dispensing device for circuit board production. The device comprises a main console, a driving arm, a position and angle adjusting assembly, a clamping seat and aglue dispensing assembly, wherein the driving arm is arranged at the left end of the main console, the driving arm is connected with the position and angle adjusting assembly through a mounting seat,the position and angle adjusting assembly comprises a first-stage adjusting assembly and a second-stage adjusting assembly, the first-stage adjusting assembly and the second-stage adjusting assembly can drive the glue dispensing assembly to move so as to adjust the position, located above a circuit board containing frame, of the glue dispensing assembly, the adjusting coverage range of the first-stage adjusting assembly and the second-stage adjusting assembly is wide, the precision is high, in addition, an angle adjusting assembly is arranged at the output end of the second-stage adjusting assembly, the angle adjusting assembly can drive the glue dispensing assembly to rotate, so that the included angle between the glue dispensing assembly and a horizontal plane is changed, the incident angle of glue injected into a circuit board is changed, the glue dispensing precision is improved, the glue dispensing assembly is fixed to the clamping seat, and the circuit board containing frame is further fixed to the main console so as to contain the circuit board.

The invention relates to the technical field of spectrum detection and particularly relates to a detecting device and method for the malondialdehyde content of field maize plant leaves. The detecting device comprises a suspension device, an electrically-driven trolley and a data processing module, wherein the suspension device is composed of a right-angled stretching arm, a universal joint and a curved knife suspension arm; the electrically-driven trolley is composed of a frame, a power supply device, wheels and a miniature direct-current motor; the data processing module is arranged on a vertical rod in the front of the frame; and the suspension device is connected with the electrically-driven trolley through a connecting rod. The detecting method comprises the steps of (a) preparing equipment; (b) correcting a white spectroscopic plate; (c) regulating a spectrum acquiring angle; and (d) calculating a rationalized value. According to the detecting device and method, field detection is adopted, laboratory detection is not needed, and therefore, the detection efficiency is high; the maize leaves can be comprehensively detected; the optimal detecting angle can be obtained according to the natural growth habits of different maize leaves; the spectroscopic data of the positive and negative sides of the leaves can be acquired; and the whole device is simple and practical, low in cost and easy to popularize.

The invention discloses a PT symmetric Cantor photonic crystal structure capable of realizing coherent absorption laser points. Two uniform dielectric sheets with different refractive indexes meet the arrangement of Cantor photonic crystals with a sequence number N of 3. The iteration rules of the Cantor sequence are that: S0 = A, S1 = ABA, S2 = ABABBBABA, S3 = S2 (3B) 2S2,..., SN = SN-1 (3B) N-1SN-1,...; the refractive indexes of materials in the dielectric sheets are modulated, so that the material refractive index of the whole structure meets the PT symmetry condition that n (z) = n * (-z); coherent perfect absorption laser points with different wavelengths can be obtained by regulating and controlling the incident angle of light waves and the gain loss coefficient in the PT symmetric Cantor photonic crystal. The coherent perfect absorption laser points can be used for manufacturing a laser, and the working wavelength of the laser can be flexibly regulated and controlled through a gain-loss factor. The structure has the advantages of improved light amplification factor, reduced structural size and the like.