7 results about "Porro prism" patented technology

The invention discloses a grinding processing method of a Porro prism, which comprises the following steps: step 1, rough grinding processing: selecting a rectangular original block, repairing a 90-degree angle of a raw material block to be within 2 minutes, grinding a first reflecting surface A and a second reflecting surface D on the raw material by leaning against the body, wherein the size of the first reflecting surface A and the second reflecting surface D is 0.3 mm greater than that of a finished product, and the angle error is within 5 minutes; secondly, accurate grinding and polishing machining is conducted, specifically, the size error is controlled within 0.005 mm after the four machining faces of the roughly-ground formed part are ground through a plane accurate grinding machine, and polishing machining is conducted, specifically, the four faces subjected to accurate grinding machining are subjected to plane grinding and polishing; step 3, cleaning the ground and polished part after the part is discharged from the disc, performing ultrasonic cleaning, and wiping the part to be clean; and 4, a laser Fizeau interferometer is used for conducting surface type inspection on the four polished surfaces, a dial indicator is used for inspecting the size, a comparison goniometer is used for inspecting the angle, and the part is submitted for inspection after being qualified.

The application relates to the technical field of wave prism processing, and provides a wave prism processing method, which comprises the following steps: performing upper disc sanding and polishing on a first side surface and a second side surface of a blank, so that the surface shapes of the first side surface and the second side surface reach a first surface shape reference and are parallel; performing lower disc inverting on the column surface angle between the first side surface, the second side surface and a bottom surface; processing the bottom surface and a top surface; performing optical gluing of the bottom surface on a first tool, performing optical gluing of a first side wall of the first tool to an optical gluing disc, milling and grinding the column surface angle between the first side surface and the top surface, and forming a first ridge surface; performing optical gluing of a second side wall of the first tool to the optical gluing disc, milling and grinding the column surface angle between the second side surface and the top surface, and forming a second ridge surface; performing chamfering on a ridge edge; and performing finishing polishing on the first ridge surface and the second ridge surface. The method can perform chamfering processing on the ridge edge while processing the ridge surface, and improves the product precision while meeting the product design requirements.

The utility model provides a binocular image stabilization assembly and an image stabilization telescope. The binocular image stabilization assembly comprises a front fixing assembly, a moving assembly, a rear fixing assembly and a control circuit. The front fixing assembly and the rear fixing assembly are fixedly connected through a fastener, and the moving assembly is clamped between the front fixing assembly and the rear fixing assembly to form a sandwich structure. The front fixing assembly and the rear fixing assembly are each provided with three sets of driving magnetic steel, two sets of driving magnetic steel are horizontally arranged, and the other set of driving magnetic steel is arranged in the direction perpendicular to the front two sets of driving magnetic steel. Three groups of driving coils are correspondingly arranged on the moving assembly, and each group of driving coils is arranged between the corresponding driving magnetic steel of the front fixing assembly and the rear fixing assembly, so that the double-side magnetic steel type voice coil motor is formed, the structure of the magnetic steel assembly is optimized, the number of parts and the cost are reduced, the assembling and debugging steps are reduced, and the size of the image stabilizing module is reduced; the image stabilizing device has the advantages of high image stabilizing precision, high integration level, simple structure, convenience in production and high cost performance, and can be arranged in the Porro prism type binocular telescope to realize the optical image stabilizing function.

The utility model discloses a small-size telescope optical system, which is characterized in that an objective lens first lens, an objective lens second lens, a Porro first prism, a Porro second prism, an eyepiece first lens, an eyepiece second lens and an eyepiece third lens are sequentially arranged from an object side to an image side along the direction of an optical axis, the first objective lens and the second objective lens form a cemented lens, the first objective lens is a biconvex lens, the second objective lens is a concave-convex lens, the concave surface faces the object side, the first eyepiece lens is a biconvex lens, the second eyepiece lens and the third eyepiece lens form a cemented lens, the second eyepiece lens is a biconvex lens, and the third eyepiece lens is a concave-convex lens. The third lens of the eyepiece is a concave-convex lens, the concave surface faces the object side, and the size is small.

This invention discloses an all-solid-state, tune-free slab laser based on orthogonal Porro prisms, belonging to the field of solid-state laser technology. A diode array is used as the pump source; a pump shaping system homogenizes and shapes the slow axis of the diode array; a coupling cavity mirror introduces the shaped light field into the slab laser crystal and also functions as an oscillating laser reflector; the prisms of the first and second Porro prisms are orthogonal; the light field introduced into the slab laser crystal reaches the first Porro prism via a polarizer, is reflected, and then enters the coupling cavity mirror via the polarizer. It oscillates multiple times back and forth between the end face of the coupling cavity mirror and the end faces of the longitudinally arranged first and second reflectors, reaching the second Porro prism, and then returning along the same path to the first Porro prism, where it is output by the polarizer. This invention can output large single-pulse energy based on a single resonant cavity, eliminating the need for cascaded amplification, resulting in a highly compact system with high photoelectric conversion efficiency.

The invention discloses a gas detection system with a high-sensitivity H-type photoacoustic cell, the gas detection system comprises a photoacoustic cell assembly, a first cylinder assembly and a second cylinder assembly, the photoacoustic cell assembly comprises a shell (1), a first protruding part is arranged on the A side of the shell (1), a laser (2) is arranged in the first protruding part, a first lens (3) is arranged in the emergent direction of the laser (2), and a second lens (4) is arranged in the first lens (3). Similarly, a second protruding part is further arranged on the side A of the shell (1), a second lens (4), a third lens (5), a reference cell (6) and a pyramid (7) are arranged in the second protruding part, a Porro prism (8) is arranged on the side B in the shell (1), the side A and the side B are two opposite side faces, meanwhile, the Porro prism (8) can reflect laser emitted by the laser device (2) into the second protruding part, and the laser device (2) can reflect the laser emitted by the laser device (2) into the second protruding part. And a photoacoustic cell (9) is also arranged in the middle of the shell (1).

An image-stabilizing assembly adopts a sandwich structure, three sets of coils is disposed on a movable component, and magnetic steels on two sides of each set of coils are respectively disposed on fixed components. The movable component is separated from the fixed components by rolling balls and moves smoothly. The fixed components and the movable component are designed as an integrated assembly. During assembly, corresponding components are simply placed in sequence. This design has advantages of simple structure, easy assembly, convenient debugging, high reliability and high cost-effectiveness. It optimizes a structure of a magnetic steel component, reduces a number and cost of components, simplifies assembly and debugging steps, and decreases a size of an image-stabilizing module. It also features high stabilization accuracy, high integration, simple structure, convenient production, and high cost-effectiveness, and can be integrated into an inside of a Porro prism-type binocular telescope to achieve optical image stabilization.