55results about How to "Short working distance" patented technology

An apparatus basically uses a simple and compact multi-axis magnetic lens to focus each of a plurality of charged particle beams on sample surface at the same time. In each sub-lens module of the multi-axis magnetic lens, two magnetic rings are respectively inserted into upper and lower holes with non-magnetic radial gap. Each gap size is small enough to keep a sufficient magnetic coupling and large enough to get a sufficient axial symmetry of magnetic scale potential distribution in the space near to its optical axis. This method eliminates the non-axisymmetric transverse field in each sub-lens and the round lens field difference among all sub-lenses at the same time; both exist inherently in a conventional multi-axis magnetic lens. In the apparatus, some additional magnetic shielding measures such as magnetic shielding tubes, plates and house are used to eliminate the non-axisymmetric transverse field on the charged particle path from each charged particle source to the entrance of each sub-lens and from the exit of each sub-lens to the sample surface.

An apparatus basically uses a simple and compact multi-axis magnetic lens to focus each of a plurality of charged particle beams on sample surface at the same time. In each sub-lens module of the multi-axis magnetic lens, two magnetic rings are respectively inserted into upper and lower holes with non-magnetic radial gap. Each gap size is small enough to keep a sufficient magnetic coupling and large enough to get a sufficient axial symmetry of magnetic scale potential distribution in the space near to its optical axis. This method eliminates the non-axisymmetric transverse field in each sub-lens and the round lens field difference among all sub-lenses at the same time; both exist inherently in a conventional multi-axis magnetic lens. In the apparatus, some additional magnetic shielding measures such as magnetic shielding tubes, plates and house are used to eliminate the non-axisymmetric transverse field on the charged particle path from each charged particle source to the entrance of each sub-lens and from the exit of each sub-lens to the sample surface.

The present invention relates to a pump for discharging contents, in which a pump upper body having contents outlets formed therein is inserted into the upper part of a pump main body having a contents inlet formed therein, a pump inner body is fitted into the inside of the pump main body and the pump upper body, the pump inner body integrally includes the serving as a temporary content reservoir for temporarily storing the contents, a suction valve plate for sucking the contents, and a discharge valve protruding ring for discharging the contents, and thus the contents are discharged as the volume of the temporary content reservoir in the pump inner body is changed by vertically moving the pump upper body relative to the pump main body.

To allow placement of optical members by providing a long back focus, make aberrations less subject to manufacturing errors, and reduce variations in aberrations during focusing. An endoscopic objective optical system includes, in order from an object side, a front group with negative refractive power, a focusing lens, and a rear group with positive refractive power, wherein: the endoscopic objective optical system satisfies conditional expressions (1) to (4) below:4<FB / FL  (1)FL / |fc|<0.1  (2)−3<F_F / FL<−0.9  (3)2.5<F_R / FL<5  (4)where FB is back focus of the entire system, FL is a focal length of the entire system, fc is a focal length of the focusing lens, |fc| is an absolute value of fc, F_F is a focal length of the front group, and F_R is a focal length of the rear group.

A method for optically examining a plurality of microscopic samples. The samples are channeled one after the other by means of a flow into at least one flow channel in which the samples advance along a flow direction. The samples are illuminated, and light emitted from the samples is detected and analyzed. A device for carrying out the method in which samples are illuminated in that at least one light sheet with a light sheet plane is directed onto the at least one flow channel, wherein the light sheet is oriented so as to intersect the at least one flow channel in an intersection region, and the normal of the light sheet plane forms an angle differing from null together with the flow direction in the intersection region. The light emitted from the sample is registered by an imaging optical detection unit, and the focal plane of said optical detection unit lies in the intersection region.

A highly reliable optical pickup which is not likely to collide with an optical disk is provided. Relative positions of two objective lenses 100 and 101 (along a focus direction) on a lens holder 102 are determined so that, while the objective lens 101 having a longer working distance is focused on an optical disk 200, the objective lens 100 having a shorter working distance and a protective member 103 are at positions which are more distant from the optical disk 200 than a height h of a protrusion which is present in an inner peripheral region of the optical disk optical disk 200.

The invention discloses a method and a system for optimizing dispatching based on RFID, belonging to the technical field of RFID radio frequency identification. In the dispatching optimizing method, the product of the distance d between a forklift and cargos and the rated load-lifting capacity w of the forklift is used as the reference of estimating the work cost f of the forklift, the task dispatching problem of the forklift is abstracted into an appointing problem of m forklifts and n tasks and the optimal dispatching scheme is realized by calculating the lowest total work cost of all forklifts. According to the method and system for optimizing dispatching, the optimization to the traditional forklift dispatching problem is realized, the RFID technique can be positioned more real-timely and precisely, the measurement standard of the calculation method is more scientific, the forklift dispatching in a factory is more systemized, the work efficiency of the forklift is improved and the work cost of the forklift is reduced.

The invention relates to a method and an equipment system for forming a tapping hole in a blast furnace. The method comprises the following steps: firstly, drilling a hole in the blast furnace along a preset tapping channel from a tapping hole reference point by adopting a mechanical tapping hole forming machine, and withdrawing a drilling rod of the mechanical tapping hole forming machine from the tapping channel when the drilling rod reaches a preset position; and secondly, generating laser by adopting a laser tapping hole forming machine to break through the tapping channel along the hole drilled by the mechanical tapping hole forming machine. The equipment system comprises a mechanical tapping hole forming machine and a laser tapping hole forming machine capable of generating laser, wherein the mechanical tapping hole forming machine and the laser tapping hole forming machine cooperate for breaking through and forming the tapping channel of the blast furnace. The method and the equipment system have the beneficial effects that the wear of a drill bit of the mechanical tapping hole forming machine is reduced; the formed tapping channel is smooth and convenient in tapping; tapping hole forming machine equipment can be prevented from being damaged during splashing at the tapping hole; and the remote operation can be carried out, so that the personal safety of operators is ensured.

The invention belongs to a prime mover, and particularly relates to a prime mover and a working method. The prime mover comprises an evaporator, a machine body and an energy body, wherein the energy body is arranged in the machine body in a sliding mode; a closed cavity is formed between the bottom of the energy body and the inner wall of the machine body; the evaporator communicates with the cavity and continuously absorbs heat to evaporate a liquid working medium, and the volume of the working medium expands due to evaporation so as to push the energy body to move upwards to do work until the upper limit stroke; and when the ambient temperature is lower than the evaporation temperature, the energy body moves downwards to compress the gaseous working medium due to self weight to completethe liquefaction. According to the prime mover and the working method, the evaporator evaporates the liquid working medium, the volume expansion pushes the energy body to move upwards to do work, andthe mechanical energy is output; when the ambient temperature meets the set value of the liquefaction stroke, the gaseous working medium is compressed by the self weight of the energy body to carry out the liquefaction stroke; the whole working stroke and liquefaction stroke do not need other auxiliary equipment, so that unnecessary energy loss is avoided; and the whole structure is simple, the cost is low, the performance is stable, the efficiency is high, and the positive economic value is realized.

This invention provides one total reflection projection optical system for object plane to form imaging plane, wherein the said system is divided into front and back sets to form hole diaphragm as symmetric surfaces; the front set comprises first to sixth lens with one to three lens form reverse distant structure; the back set orderly comprises seven to twelve lens symmetric to six to one lens about hole radium; the said whole reflection projection optical system all surface types are of sphere or plane without non-sphere surface.