The invention provides a solar telescope diaphragm with high cooling efficiency. The solar telescope diaphragm comprises a diaphragm body having a diaphragm light hole in the middle and an annular hollow cavity therein; one end of the diaphragm body facing to incidence of light of a focal point of a telescope is called a reflective surface, and the other end of the diaphragm body is called a bottom surface; a spacer is disposed in the annular hollow cavity of the diaphragm body; one end of the spacer is fixedly connected to the bottom surface of the diaphragm body, and the other end of the spacer is close to the reflective surface of the diaphragm body; one end of the spacer close to the diaphragm body is an annular end face; a gap between the annular end face of the spacer and the reflective surface of the diaphragm body forms a cooling cavity; the position of the annular end face corresponds to an irradiated area on the reflective surface when the center of the sun is observed via the telescopic, the annular end face is similar to the shape of the irradiated area, and the area of the annular end face is not less than that of the irradiated area; and the spacer divides the annularhollow cavity of the diaphragm body into an inner side cavity and an outer side cavity, and the inner side cavity and the outer side cavity communicate with each other through the cooling cavity.

Solar telescope diaphragm

The invention relates to a space-based space sensing technology, and in particular to a space-based space sensing device and method based on a photoelectric detection technology, and a computer readable storage medium. The space-based space sensing device provided by the invention comprises a vertical cavity surface laser array used for irradiating a space target to generate reflected light; a reflected light receiving module which comprises a first reflecting mirror and a second reflecting mirror, wherein the first reflecting mirror is used for receiving reflected light of the space target and reflecting the reflected light to the second reflecting mirror, and the second reflecting mirror is used for reflecting the received reflected light to a photoelectric detection module; and a photoelectric detection module which is used for determining the space information of the space target according to the received reflected light. The device and method can be used for overcoming the defectsof large volume, high power consumption and low detection speed of the existing laser radar.

Space-based space sensing device and method

The invention relates to a large-caliber solar telescope full absorption thermal diaphragm based on dual-channel cooling. The large-caliber solar telescope full absorption thermal diaphragm has smallinterference to light path, is easy to control in temperature, and is less likely to be affected by environment, so that the solar telescope delivers a much better observation effect. Structurally, the thermal diaphragm comprises a shell, an absorption screen, a middle cone, and a conic view field diaphragm that are arranged coaxially in sequence from outside to inside, wherein an outer pressure cavity is formed between the shell and the absorption screen, an absorption cavity is formed between the absorption screen and the middle cone, an internal pressure cavity is formed between the middlecone and the conic view field diaphragm, an entrance water storage tank communicated with the internal pressure cavity is arranged outside the internal pressure cavity, the entrance water storage tankis provided with a liquid inlet tube, the water inlet tube is communicated with a cooling liquid supply device, an external pressure cavity and the internal pressure cavity are communicated through aconnection tube, one end of a liquid outlet tube is communicated with the external pressure cavity, the other end thereof is communicated with the cooling liquid supply device.

Large-aperture solar telescope full-absorption thermal diaphragm based on dual-channel cooling

The utility model relates to a three-waveband airborne laser radar system The system realizes high-efficiency, high-precision, high-resolution, large-range and long-distance detection work of each area of the coastal zone The main principle is that a laser light source synchronously emits three beams of laser pulses with different wavelengths and sends an initial trigger signal to a timing system, and the timing system starts timing; the three beams of laser pulses enter the scanning system after being expanded and collimated by the transmitting system; the scanning system controls the laserpulse to scan the surface of the to-be-measured target, the laser pulse is reflected by the surface of the to-be-measured target and then returns to the scanning system, and the scanning system reflects the echo optical signal to the receiving optical path system; the receiving optical path system collects echo optical signals and reflects the echo optical signals to the laser detection system; the laser detection system converts the received echo optical signal into a photocurrent signal and outputs the photocurrent signal; and the timing system ends timing after receiving the photocurrent signal so as to obtain distance information from the surface of the to-be-measured target to the scanning system

Three-waveband airborne laser radar system

The invention provides a total reflection type underwater camera suitable for a deep sea environment. The camera comprises window glass, a detector shell, a detector and a reflective optical system, wherein a light through hole is formed in one end of the detector shell, the other end of the detector shell is closed, and the window glass and the detector are sequentially arranged in the detector shell in the light incident direction; the reflective optical system is positioned in front of the light through hole and is fixedly mounted on the detector shell; the reflective optical system is provided with a light inlet and at least one reflector, and the relative positions of the light inlet and at least one reflector must ensure that light beams passing through the light inlet can pass through the light through hole and the window glass in sequence after being reflected by at least one reflector and are finally received by the detector. The camera avoids the influence of high-intensity pressure difference caused by an air-water interface on the reflective optical system and can be used in the deep sea environment.

Total reflection type underwater camera suitable for deep sea environment

The invention relates to a cutter correction method of an optical device processing machine tool, in particular to a method for quickly correcting horizontal offset of a cutter in ultra-precision turning, and solves the technical problems of complicated correction process and lower correction efficiency in an existing horizontal correction method of the cutter of the machine tool. The correction method comprises the following steps of carrying out precision turning on a plane for tool setting on a tool setting piece, and then turning a micro annular belt on the plane for tool setting through controlling machine tool coordinates; accurately measuring the sizes of the inner diameter and the outer diameter of the micro annular belt by using a Zygo white light interferometer; and calculating the horizontal offset according to the inner and outer diameters, and correspondingly adjusting the horizontal offset of the cutter in a machine tool system to realize quick correction of the horizontal offset of the cutter. The method greatly increases the horizontal offset correction speed of the cutter, and has important significance in the field of ultra-precision turning.

Method for quickly correcting horizontal offset in ultra-precision turning

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Large-aperture solar telescope full-absorption thermal diaphragm based on dual-channel cooling

Three-waveband airborne laser radar system

Total reflection type underwater camera suitable for deep sea environment

Method for quickly correcting horizontal offset in ultra-precision turning