4 results about "Foldscope" patented technology

The application belongs to the technical field of precise optical machine adjustment and testing, and provides a long-focus total reflection optical system adjustment method suitable for large aperture, which is used to solve the problem of low adjustment efficiency of long-focus total reflection optical system. The main mirror and the secondary mirror detection area are made by CGH compensator, so that the main mirror and the secondary mirror can be positioned with high precision. The folding mirror and the focusing mirror are fixed according to the optical axis reference, and the three mirrors are combined with computer-aided iterative fine adjustment. By using the application, the adjustment degrees of freedom of the total reflection space camera optical system can be reduced from 30 to 5, the adjustment efficiency is improved, and the high-precision adjustment of the large-aperture long-focus total reflection space camera optical system is realized.

The present invention relates to a single and / or dual laser delivery system attached to an existing ophthalmic operating microscope, comprising of a single and / or dual wavelength laser unit [1]; and a delivery system [5]. The laser unit [1] comprises of a green laser module 532 nm [3] and a yellow laser module 577 nm [4] along with an aiming beam [7] 635 nm. The delivery system comprises of a right-angle prism [5A]: X and Y Galvo assembly [5B] and a focusing lens assembly [5C]. The laser unit passes through a fiber optic cable [6] gets reflected using the right angle prism, gets deflected by the Galvo assembly, enters the focusing lens assembly and gets reflected by a folding mirror [5D] and focused on human eye capsule. The system converges and focuses the laser wavelengths in line with the aiming beam to create a circular pattern to accomplish a pre-measured Capsulorhexis.

A compact and highly accurate optical density measuring apparatus that includes an ellipsoidal mirror and a folding mirror is provided. In the optical density measuring apparatus, the shape of at least a part of the inner surface of a light guiding part is composed of a figure of a part of an ellipsoid E, and a shape of at least a part of another portion of the inner surface of the light guiding part is composed of a figure of a part of a plane or a quadric surface. 60% or more of the area of a light source region of a light emitting part is present in a region Rin, and 60% or more of the area of a light receiving region of a light receiving part is present in a region Rout.

The present application relates to the technical field of optical mechanical adjustment, and particularly relates to a folded optical path off-axis three-mirror system adjustment device and method; the folded optical path off-axis three-mirror system adjustment device comprises an interferometer, a theodolite and a compensator mounted on one side of a main mirror incident surface, a first straight edge and a second straight edge are arranged on a bottom plate of the compensator, and the first straight edge and the second straight edge adjacent to each other form a first included angle; a reference structure is connected by the theodolite and a main mirror optical path, and a main mirror optical axis is perpendicular to the first straight edge; three optical axis transmission structures are arranged based on the property of similar triangles; the first optical axis transmission structure makes the flat glass parallel to the first straight edge; the second optical axis transmission structure makes the normal direction of the flat glass coincide with the optical axis of the plane mirror; and the third optical axis transmission structure makes the folding mirror parallel to the second straight edge. The present application obtains the optical axis of the main mirror by using the compensator, and then calibrates the folding mirror through the bottom plate. Then, the adjustment of the misalignment amount is carried out, and the number of misalignment amounts used for adjustment is small.