108 results about "Beam laser" patented technology

A river channel flow estimation method based on an unmanned aerial vehicle and decision tree regression comprises the steps that the unmanned aerial vehicle is used for carrying a small dual-beam laser radar and an ultrasonic flow meter to measure the coordinates of a river channel section measuring point, the water depth and the water body surface flow velocity; according to the determined riverway water surface range, fine segmentation division is carried out, and the abscissa of the vertical line of each segment is determined; performing supervised learning by using a decision tree regression algorithm, determining a subset after model training according to the set maximum depth of a decision tree, and predicting the water depth and the surface flow velocity corresponding to each segment vertical line; and according to the predicted water depth and surface flow velocity of each vertical line, calculating the water passing area and the average flow velocity between adjacent vertical lines, and obtaining the cross-section flow of the river channel by multiplying and accumulating the area of each section and the average flow velocity. The method has an important practical value in river flow measurement under any complex water regimen.

The invention discloses an unknown environment mapping method for a single-beam laser of aircraft, which belongs to the field of three-dimensional map reconstruction technology. Firstly, the data collected by a single-beam LiDAR is aligned with the timestamp of the stepper motor, and the obtained point cloud data is filtered and matched to obtain three-dimensional map information. The pose of the aircraft is estimated by the wheel odometer and IMU, and the loop detection is performed to reduce the cumulative error and update the three-dimensional map information in real time. The frontier search algorithm is used to determine the target point of the aircraft flight, the A* algorithm is used to plan the path trajectory, and the B-spline curve optimization algorithm is used to make the trajectory of the aircraft smoother. The control command is sent to the aircraft, and then the global three-dimensional map of the unknown environment is obtained.

The utility model discloses a three-beam laser equipment automatic side-leaning workbench, which belongs to the technical field of laser processing equipment, and comprises a conveying platform and three groups of laser cutting components, and the three groups of laser cutting components are arranged on the conveying platform along the feeding direction and are connected with the conveying platform in a sliding manner; the conveying platform comprises a base, a mounting plate, a rolling shaft and a flange assembly; the two sets of mounting plates are symmetrically fixed to the two sides of the upper portion of the base. The multiple rolling shafts are parallel to one another and form included angles with the feeding direction, the two sides of each rolling shaft are rotationally connected with the base, multiple discs are evenly arranged on the rolling shafts, and the discs on every two adjacent sets of rolling shafts are arranged in a staggered mode. A guide plate is arranged on the inner side of the end, close to the discharging end, of the push plate. A limiting rod is arranged at the end, close to the conveying platform discharging end, of the conveying platform. By means of the rolling shafts and the discs which are arranged in an inclined mode, plates are close to the mounting plate on one side; and meanwhile, the plate is limited and clamped through the flange assembly.

The application provides a robot tool coordinate system calibration device and method. The robot tool coordinate system calibration device comprises a control device configured to be in communication connection with a robot; a laser device, the laser device comprising a laser emitting module and a laser receiving module, both of which are in communication connection with the control device, the laser emitting module being configured to be capable of forming a cross-shaped laser beam, the laser receiving module being capable of receiving the cross-shaped laser beam, two first laser beams forming the cross-shaped laser beam being perpendicular to each other. The technical scheme of the application can solve the problem of low calibration accuracy and efficiency of the calibration mode of the prior art.

The invention discloses a machining method for a laser quenching cutter point, and belongs to the technical field of metal surface treatment and cutter machining. According to the method, efficient and uniform quenching of the cutter point is achieved through multi-beam laser composite scanning and artificial intelligence real-time feedback control; the method comprises the steps of workpiece pretreatment, multi-beam laser scanning, real-time monitoring and feedback control, post-treatment and quality evaluation. The method has the effects of reducing heat affected zones, improving hardening uniformity and reducing energy consumption.

The invention discloses a laser light source-based baffle-free integrated automobile headlamp optical system, which comprises a low-beam laser light source, a high-beam laser light source, a low-beam focusing reflector, a high-beam reflection cup and a high-beam and low-beam light distribution lens, the high-beam and low-beam laser light source comprises a blue laser diode, a laser collimating lens, a laser focusing reflector and a curved reflector embedded with yellow fluorescent powder, and the low-beam focusing reflector and the high-beam reflection cup are used for reflecting light to the lower half portion and the upper half portion of the high-beam and low-beam light distribution lens respectively. The high-beam and low-beam light distribution lens is a double-free-form-surface lens of a segmented structure, the upper half portion of the lens is a two-section symmetrical fan-shaped lens and used for high-beam illumination, and the lower half portion of the lens is a four-section fan-shaped lens and used for low-beam illumination. According to the baffle-free dual-light integrated structural design, the weight of the headlamp can be effectively reduced, the size is reduced, and the system stability is improved.

This invention provides a multi-aperture coherent combining system with split-path phase modulation detection, relating to the field of optoelectronic technology. The system, along the optical path, sequentially includes a split-beam laser source module, a signal generation module, a multi-aperture emission module, a signal demodulation module, and a marker feedback module. The signal generation module receives multiple split-beam lasers and generates different modulation signals, using these signals to modulate different split-beam lasers. The signal demodulation module, located at the optical axis of a far-field target, demodulates the modulated split-beam lasers in the combined beam to obtain split-beam lasers deviating from the optical axis. The marker feedback module marks the deviated split-beam lasers and feeds them back to the optical axis processing module connected to the split-beam laser source module, thereby enabling the detection of far-field spots. This invention solves the problems of low compensation accuracy and efficiency in closed-loop correction during multi-aperture coherent combining.

The invention discloses an integrated multi-beam device and method for aircraft part laser preheating, polishing and strengthening, and the device comprises a computer control system, a laser preheating device, a picosecond pulse laser device, an ultra-strong pulse laser device and a workbench, wherein the computer control system is used for controlling the movement of the laser preheating device, the ultra-strong pulse laser device, the picosecond pulse device and the workbench; the laser preheating device is used for focusing large-light-spot continuous laser beams on the surface of the aircraft part loaded on the surface of the workbench, and preheating of the surface of the aircraft part is achieved. The picosecond pulse device is used for forming small light spots which are focused on the preheated surface of the aircraft part to polish the surface of the aircraft part; the ultra-strong pulse laser device is used for forming high-energy small light spots which are focused on the polished surface of the aircraft part, and laser shock peening of the surface of the aircraft part is achieved. The machining efficiency and precision of aircraft parts can be effectively improved, and the manufacturing cost is reduced.

The invention discloses a self-delay double-target collision plasma generating device and method, and belongs to the technical field of plasmas, the self-delay double-target collision plasma generating device comprises a laser system, a vacuum chamber and a target material assembly arranged in the vacuum chamber, and the target material assembly comprises a first composite target and a second plane target in the laser propagation direction; the first composite target comprises a film substrate and a first tin layer; the second planar target comprises a second tin layer; and a preset distance is set between the thin film substrate and the second tin layer. The laser system emits a single beam of pulse laser to be focused on the first composite target, ablates the first tin layer to generate first plasma and breaks down the film substrate, transmitted laser energy ablates the second tin layer to generate second plasma, and the first plasma and the second plasma collide oppositely to form a stagnation layer. The single-beam laser and a special composite target material structure are utilized, self-delay plasma collision is achieved through a physical mechanism, the system structure is simplified, and the constraint performance of a plasma stagnation layer is improved.

The utility model relates to the field of laser welding, in particular to a precise positioning double-beam laser welding auxiliary platform. Comprising a rack, a placing table, a driving assembly, a welding head, a first electric sliding rail, a partition plate, a fixing base, a first sliding rod, a first elastic piece, a limiting plate and the like. A placing table and a driving assembly are arranged on the upper side of the rack, two welding heads are installed on the driving assembly, first electric sliding rails are arranged on the front side and the rear side of the placing table correspondingly, sliding blocks of the two first electric sliding rails are connected with the front end and the rear end of the partition plate correspondingly, two fixing bases are arranged on the left portion and the right portion of the upper side of the rack correspondingly, and first sliding rods are arranged on the fixing bases in a sliding mode. Through the design of the partition plate, the limiting plate, the first elastic piece and other components, it is guaranteed that a welding piece does not displace in the horizontal direction, deviation caused by vibration or thermal deformation in the welding process is avoided, and welding precision is improved.

The invention belongs to the technical field of remote sensing, and relates to an atmospheric calibration instrument data processing method using active and passive cooperative remote sensing, which comprises the following steps: S1, carrying a synchronous atmospheric calibration instrument integrating a multispectral polarization camera and a multi-beam laser radar on the same satellite with a high-resolution imaging load to realize complete coverage of an observation area and time-space synchronous observation, acquiring multispectral polarization data and laser radar data; s2, on the basis of laser radar data, atmospheric vertical profile parameters are inverted through a parameter inversion method; s3, based on the multispectral polarization data, combining with a ground surface polarization reflectivity model to invert aerosol related parameters; s4, performing space-time matching and uniformity judgment on the laser radar data and the multispectral polarization data, and screening effective synchronous observation points; s5, collaborative inversion and iterative optimization are carried out based on the active and passive data of the synchronous observation points, and geogas three-dimensional space-time distribution parameters are obtained; and S6, performing atmospheric correction on the remote sensing data of the high-resolution imaging load.

A low-power-consumption derailment detection apparatus for railway freight cars, said apparatus comprising a detection module, a diagnosis module, an actuation module, a power management module and a storage battery; the power management module is mounted near a center plate of a car body, and is used for controlling the storage battery to supply power to the derailment detection apparatus when the vibration acceleration of the car body is greater than a preset threshold value, and controlling the derailment detection apparatus to power off when the vibration acceleration of the car body is not greater than the preset threshold value; the detection module is used for detecting, by means of through-beam laser technology, the positions of wheel sets relative to the car body, and transmitting a detection result to the diagnosis module; the diagnosis module is used for logically determining, on the basis of the detection result, whether a car has derailed, when detecting that the car has derailed, outputting a derailment signal to the actuation module, and when detecting that the car has not derailed, controlling the derailment detection apparatus to power off after a system operates for a short period of time; and the actuation module is used for controlling, after receiving the derailment signal, the train to perform emergency braking. The derailment detection apparatus has a structure that is conveniently assembled and disassembled; and all devices are mounted on a car body, and thus a connecting ring between the car body and a bogie is omited, thereby greatly reducing the workload of mounting and dismounting the automatic derailment detection apparatus during lifting and lowering of the car. The present application also relates to a detection method.

This invention discloses a multi-beam laser interference lithography system and method for periodic three-dimensional micro / nano structures. The system includes a laser, a diffraction element, a 4F collimation-beam control-focusing module, and a piezoelectric stick-slip precision motion system. The laser is perpendicularly incident on the diffraction element, which diffracts the beam into N sub-beams and one central beam distributed symmetrically. The 4F collimation-beam control-focusing module includes a first Fourier transform lens, a custom beam control frame, and a second inverse Fourier transform lens. The first Fourier transform lens collimates the umbrella-shaped N+1 beam generated by the diffraction element into a parallel N+1 beam. The custom beam control frame includes a half-wave plate and a polarizer along the optical axis. The second inverse Fourier transform lens focuses the parallel N+1 beams onto the same point on the sample. The lithography of the sample is completed by coordinating the spatial interference light field with the movement of the piezoelectric stick-slip precision motion system.

This invention proposes a method for fabricating three-dimensional photonic crystals based on the standing wave effect, comprising: ultrasonically cleaning a silicon substrate; spin-coating photoresist onto the cleaned silicon substrate surface, followed by a pre-baking process to form a resist layer on the silicon substrate surface; performing a first exposure on the resist layer using a dual-beam laser interferometry system to form horizontal interference fringes within the resist layer, while the incident light interferes with the reflected light from the silicon substrate to generate a vertical standing wave effect; keeping the silicon substrate unchanged, rotating the sample around a vertical axis, and performing a second exposure using the same parameters to form a second set of interference fringes in the horizontal direction, which superimposes with the first exposure to form a two-dimensional periodic light intensity distribution, while the vertical standing wave effect superimposes to enhance the intensity modulation depth.

The present application relates to the technical field of metal selective additive manufacturing, and discloses a multi-laser galvanometer module, a multi-laser selective melting device and a visual guidance correction method of a multi-laser galvanometer, which comprises a multi-beam laser galvanometer, a field lens, an electrically adjusted ring and a light path protection lens; the light path protection lens comprises a protection vertical lens and a protection horizontal lens; the multi-beam laser galvanometer is a double-beam or multi-beam module structure, the multi-beam laser galvanometer comprises an X-axis mirror and a Y-axis mirror, the X-axis mirror and the Y-axis mirror are arranged in a mirror image or a straight line array form, and the X-axis mirror and the Y-axis mirror have at least two groups; two independent motors are respectively drivenly connected with the corresponding groups of X-axis mirrors and Y-axis mirrors, and the present application can meet the processing requirements of small multi-laser in a range, improve the space utilization of the processing range and the accuracy of the overall forming of the device.

The present application relates to the technical field of metal material welding, and particularly relates to a double-beam laser welding method, which comprises the following steps: double-beam laser welding is carried out by using double laser heads; the upper laser head is inclined to the welding direction, and the inclination angle between the upper laser head and the vertical line of the surface of the welding plate is 3-6 degrees, and the laser defocusing amount is -2mm to -5mm; the lower laser head is inclined to the welding direction by 3-6 degrees, and the inclination angle of the lower laser head is greater than that of the upper laser head, and the laser defocusing amount is -2mm to +2mm; the distance between the focal points of the upper and lower laser heads in the horizontal direction is kept between 0.5mm and 1.0mm; the laser welding power is adjusted to carry out welding, the welding penetration of the upper laser head reaches 0.7t or above, and the welding penetration of the lower laser head reaches 0.3t-0.6t, and t is the plate thickness; the present application solves the problems of high reflection and porosity in the laser welding of aluminum or aluminum alloy, and effectively controls the molten pool solidification and laser high reflection in the welding process through the upper and lower double-beam welding.

Disclosed in the present invention is a multi-beam laser weld seam identification and welding path planning method for cylinder and cover plate welding encapsulation, comprising: simultaneously projecting n parallel line-structured laser stripes onto the surfaces of a cylinder and a cover plate that are to be welded, n being greater than or equal to 2, and photographing and acquiring an image containing all the line-structured laser stripes; identifying inflection point coordinates of all the line-structured laser stripes in the acquired image, and fitting the outer circle of the cover plate and the inner circle of an outer cylinder on the basis of the identified inflection point coordinates; calculating the inner wall circle of the cylinder on the basis of the inner circle of the outer cylinder and the wall thickness of the cylinder, and taking the center ellipse of a figure between the inner wall circle of the cylinder and the outer circle of the cover plate as a welding trajectory; and taking the widest portion of the overlapping area between the cover plate and the cylinder wall as the starting point of the welding trajectory. The present invention does not require scanning a workpiece by using line-structured laser to obtain a three-dimensional surface profile, and the weld seam center path can be directly identified from a single image, thereby achieving high efficiency.

This invention belongs to the field of laser technology, specifically relating to a common-cathode multi-beam laser, comprising a cathode assembly, multiple anode assemblies, an optical resonant cavity assembly, and a power supply module. The power supply module is electrically connected to both the cathode and anode assemblies, providing operating voltage to them. Multiple anode assemblies are spaced apart above the cathode assembly. The optical resonant cavity assembly, positioned above the anode assemblies, includes multiple mirrors and an output mirror. Each mirror corresponds to one of the anode assemblies, forming multiple independent optical resonant cavities together with the output mirror. The common-cathode design allows multiple anode assemblies to share the same cathode, greatly simplifying the laser structure and significantly reducing the device size and production costs compared to traditional multi-beam lasers with multiple independent laser units.

The invention relates to the technical field of graphene preparation, and particularly discloses a controllable preparation method of high-uniformity laser-induced graphene, which comprises the following steps of: acting a main processing light beam, an annealing auxiliary light beam and a quenching auxiliary light beam on the same processing area of a substrate in a space-time synergistic manner, the main processing light beam is used for inducing the substrate to generate graphitization to form an sp2 carbon network; the annealing auxiliary light beam is triggered by a pulse of a preset delay time relative to the main processing light beam and is used for carrying out in-situ annealing on the processing area so as to repair defects in the sp2 carbon network; and the quenching auxiliary light beam is used for generating a plasma sheath layer in the processing area to isolate air and prevent oxidation. Through a three-beam space-time cooperative processing mechanism of main processing beam induced graphitization-annealing auxiliary beam in-situ annealing-quenching auxiliary beam plasma quenching, the problems of uneven interlayer structure and high defect density caused by a heat accumulation effect in traditional single-beam laser processing are solved.

The application provides an N+1 laser interference lithography system, comprising: a light source module, which controls the exposure dose of a laser beam emitted by a laser by using an electrically controlled clock valve device, and controls the laser beam to be incident to a rotating light splitting module at 45°; the rotating light splitting module splits the amplitude of the laser beam to obtain N+1 coherent beams with similar energy, and modulates the spatial position of N edge coherent beams; a beam arm, which is used for controlling a 1 center coherent beam to be directly incident to a sample table capable of rotating by 360° and moving in three dimensions, and respectively controlling N edge coherent beams to be incident to the sample table from the same side or different sides at a specified incident angle with the 1 center coherent beam; and the sample table, which is placed with a substrate material, and a double-sided periodic or three-dimensional periodic micro-nano structure is prepared by converging the N+1 coherent beams. The system can flexibly control the light splitting ratio, the beam polarization state, the interference angle and the number of participating beams to obtain periodic structures with more parameters and pattern changes.

This invention proposes a multi-line lidar transceiver based on a TCSEL array, comprising a TCSEL light source array, a filter, a first optical lens, a scanning system, a second optical lens, a detector array, and a substrate. The TCSEL light source array, filter, first optical lens, second optical lens, and detector array are all mounted on the substrate. The centers of the TCSEL light source array, filter, and first optical lens are aligned on the same horizontal line, as are the centers of the second optical lens and detector array. The filter and detector array transmission optical paths are matched. Light emitted from the TCSEL light source array enters the filter and is split into two beams. Beam I passes sequentially through the first optical lens, scanning system, and second optical lens before entering the detector array. Beam II is directly emitted into the detector array from the filter. This application integrates the device, reducing its size, and the array light source outputs multi-beam lasers, simplifying lidar design.

The invention relates to a dissimilar material welding method in the technical field of dissimilar metal material welding, which comprises the following steps of: 1, performing laser cleaning and activation pretreatment on a to-be-welded interface of 12Cr17Mn6Ni5N stainless steel and brass by using low-power pulse laser; secondly, the pretreated 12Cr17Mn6Ni5N stainless steel and brass are assembled in a butt joint mode, and a double-beam laser welding system is adopted for welding under protective gas; wherein the main light beam adopts continuous laser and acts on the brass side to enable the brass side to be fully melted; the auxiliary light beam adopts swing pulse laser and acts on the 12Cr17Mn6Ni5N stainless steel side to enable the surface of the 12Cr17Mn6Ni5N stainless steel to be instantly and slightly melted; and thirdly, after welding is completed, the workpiece is naturally cooled under the protective atmosphere. According to the scheme, high-strength and low-brittleness high-quality connection of the 12Cr17Mn6Ni5N stainless steel and the brass can be effectively achieved.

The utility model discloses a kind of laser system with real-time monitoring protection function, including laser, AOM module, monitoring module and laser controller, laser is connected with AOM module;Monitoring module includes light splitting unit, laser probe, power monitoring module, light splitting unit is connected with AOM module, laser probe is connected with light splitting unit, power monitoring module includes relay, laser controller is connected with laser by relay;Laser emits laser and is chopped by AOM module and obtains first light beam, first light beam is again divided into working light beam and detection light beam by light splitting unit, laser probe is used to monitor the output power of monitoring light beam, and the output power is converted into voltage signal and sent to power monitoring module, and relay module controls the on-off of laser controller and laser connection circuit.The utility model provides a kind of laser system with real-time monitoring protection function, monitors laser beam, and controls the switch of laser in time.

The invention relates to the field of wind power generation, in particular to a wind turbine generator yaw static error correction method and system based on a multi-beam laser radar. The method comprises the following steps: S1, scanning a wind field area in front of an impeller of a generator set through a multi-beam wind measurement laser radar mounted in a cabin of the wind turbine generator set to obtain parameter information of a plurality of spatial points; s2, performing fitting calculation on the parameter information system to obtain a fitting circle representing a horizontal wind vector of the wind field area, and solving the fitting circle to obtain a free flow wind direction; s3, the free flow wind direction is compared with the current cabin orientation, and a real-time static yaw error angle is obtained through calculation; generating a yaw control instruction according to a preset control strategy; s5, solving and calculating the fitting circle to obtain a transverse wind component, and correcting the yaw control instruction; according to the method, the control instruction is generated through the control strategy to drive the yaw system to perform dynamic compensation, so that the wind turbine generator can continuously maintain the optimal windward attitude, and the stability and long-term effectiveness of control are ensured.

This invention discloses a dual-beam laser pressure welding method for aluminum-copper inlaid composite strips. The method uses an integrating mirror and a cylindrical mirror to modulate an infrared laser into a discontinuous linear spot with uniform energy distribution. Laser beam combining technology is then used to combine the discontinuous linear spot with a blue-infrared composite laser. During laser pressure welding, the blue-infrared composite laser periodically oscillates at the edge of the composite side, and rolling force is added for assistance. This effectively solves the problems of low peel strength, poor side bonding quality, and edge warping. Simultaneously, the uniform energy distribution of the discontinuous linear spot allows for the composite processing of wide-format composite plates. This method offers advantages such as high welding speed, high side bonding stability, low porosity at the bonding interface, and small surface indentations. It is applicable to the manufacturing of copper-aluminum inlaid composite strips of various specifications (i.e., variable width and depth of each inlay slot) and types (i.e., variable number of inlay slots).

A laser microdissection system includes: a microscope having an objective lens aligned with a sample space; and a laser light source configured to generate a steering beam. The laser microdissection system also includes a dissection unit configured to couple the steering beam to the microscope and to separate the segregation from the sample disposed in the sample space by directing the steering beam onto the sample according to profile data relating to a profile on the sample surrounding the segregation. The laser microdissection system further includes a hole location positioning unit configured to move a collection arrangement comprising at least one hole location disposed below the sample relative to an optical axis of the objective lens, where the hole location is configured to capture the educt. The laser microdissection system also includes a controller configured to control the hole location positioning unit to move the collection arrangement based on the profile data such that the center of the opening of the hole location is positioned below the segregation.

The application belongs to the technical field of laser cutting, scribing and marking, and particularly discloses a double-cross-beam laser cutting, scribing and marking system, method, terminal and medium. The system comprises a machine tool main body, a first cross beam and a second cross beam arranged in sequence. The first cross beam is provided with a laser cutting head assembly, and the second cross beam is provided with a Z-axis driving mechanism and a scribing assembly. A Hall pressure sensor is fixed in a sealed cavity of the scribing assembly, and a scribing needle is connected to a pressure detection end of the Hall pressure sensor. The control method of the application extracts a calibration reference pressure value of a scribing depth in advance, collects a current force value in real time when the second cross beam performs scribing, and compares the two values, and then drives the Z-axis to move up and down in real time by using a dynamic compensation algorithm. The application realizes efficient integration of the marking and cutting processes, solves the problem that the mark is easily covered by a coating by using physical scribing, and effectively overcomes the problems of plate collision and uneven depth caused by the bending deformation of a large plate by using force feedback closed-loop servo.

The application discloses a multi-beam laser selective melting and femtosecond composite additive-subtractive optical system, which comprises a femtosecond fiber laser, a continuous fiber laser, a collimating mirror, a beam expander, a galvanometer and a focusing lens, wherein the femtosecond fiber laser, the continuous fiber laser, the beam expander, the galvanometer and the focusing lens are sequentially arranged in a laser transmission direction. The additive optical system and the femtosecond subtractive defect removal optical system are integrated, the structure is compact and simple, and the operation is convenient, and the economic practicability is high.

The application discloses a point cloud data processing method in the field of artificial intelligence, which can be applied to an automatic driving vehicle. The method comprises the following steps: acquiring a first image collected by a first camera; acquiring first point cloud data collected by a laser radar; inputting the first image and the first point cloud data into a target network to obtain first target point cloud data; wherein the number of beams corresponding to the first target point cloud data is greater than the number of beams corresponding to the first point cloud data, the target network is used for extracting a depth feature of the first image, performing feature extraction and up-sampling on the first point cloud data to obtain a first feature, and performing fusion processing on the depth feature and the first feature to obtain the first target point cloud data. According to the scheme, high-beam point cloud data can be obtained without deploying a high-beam laser radar, and the cost of the automatic driving vehicle is reduced.

An image forming apparatus incudes a photosensitive member, a scanning optical unit and a control portion. The scanning optical unit is provided with a light source including a plurality of light emitting points and emitting laser lights form the plurality of light emitting points, respectively and a deflector deflecting each of the laser lights emitted from the plurality of light emitting points into a scanning direction. The scanning optical unit scans the photosensitive member with the plurality of laser lights deflected by the deflector and forms an electrostatic latent image on the photosensitive member. The control portion controls the scanning optical unit. Based on information regarding a light emitting point pitch as an interval between the plurality of light emitting points, the control portion identifies the light emitting point pitch.