53 results about "Dioptrics" patented technology

Contact lenses incorporating asymmetric radial power profiles that increase the radial dioptric power from the center to the margin of the optical zone of the lenses may be utilized to prevent and/or slow myopia progression. The power profiles vary along different meridians.

A catadioptric projection optical system for forming an intermediate image of a first object twice and for forming an image of the intermediate image onto a second object, said catadioptric projection optical system comprising, in order from the first object side and along an optical axis of said catadioptric projection optical system, a first dioptric group that does not form a reciprocating optical system (double-pass optical system) that an incidence light and reflected light pass, said first dioptric group including a first lens group that has a positive refractive power and a second lens group that has a positive refractive power, a catadioptric group that forms the reciprocating optical system (double-pass optical system), said catadioptric group including a third lens group that forms the reciprocating optical system (double-pass optical system), a second dioptric group that does not form the reciprocating optical system (double-pass optical system), a first deflective reflector that arranges between the first lens group and the second lens group, and a second deflective reflector that arranges between the second lens group and the third lens group or between the second dioptric group and the third lens group.

Beam shaping methods, systems, devices and apparatus to provide transformation of a TEM₀₀ beam which intensity distribution is described by the Gaussian or similar functions to a focused spot of round or square shape with uniform intensity distribution achieved through introducing in the TEM₀₀ beam a phase shift function with smooth phase transition and further focusing of the transformed beam; the resulting intensity distributions are created around the focal plane of a focusing optical system. The phase shift function is introduced by a phase transforming optical system implemented in apparatuses of the invention in form of a plate, or a telescope, or a collimator, or integrated to the focusing optical system: the phase transforming optical system including an aspheric optical surface providing the phase shift function with smooth phase transition. As a focusing optical system any diffraction limited optics with positive dioptric power can be applied.

Systems, devices, and methods are presented for a prosthetic injectable intraocular lens. The lenses can be made from silicone, fluorosilicone, and phenyl substituted silicone and be semipermeable to air. One or more silicone elastomeric patches located outside the optical path on the anterior side but away from the equator can be accessed by surgical needles in order to fill or adjust optically clear fluid within the lens. The fluid can be adjusted in order to set a base dioptric power of the lens and otherwise adjust a lens after its initial insertion. The elastomeric patches are sized so that they self-seal after a needle is withdrawn. A straight or stepped slit in the patch can allow a blunt needle to more easily access the interior of the lens.

Systems, devices, and methods are presented for a prosthetic injectable intraocular lens. One or more silicone elastomeric patches located outside the optical path on the anterior side but away from the equator can be accessed by surgical needles in order to fill or adjust optically clear fluid within the lens. The fluid can be adjusted in order to set a base dioptric power of the lens and otherwise adjust a lens after its initial insertion. The elastomeric patches are sized so that they self-seal after a needle is withdrawn. A straight or stepped slit in the patch can allow a blunt needle to more easily access the interior of the lens.

A catadioptric telephoto lens system which: receives incident light rays in a parallel path of both catoptrics and dioptrics, where some of the incident light rays go through a reflective path involving mirrors/reflective surfaces and others of the incident light rays go through a refractive path involving lenses; or receives incident light rays in a serial path of catoptrics and dioptrics, where all the incident light rays initially go through a reflective path involving mirrors/reflective surfaces and then go through a refractive path involving lenses. The system eliminates the black pupil/iris blur disadvantages associated with conventional telescopic lens systems and may be provided in a very compact form.

A solar energy device with parallel dioptric lens: parallel rays are emitted through a dioptric lens before overlapping and projecting in an area on a focusing plane, but no focus is formed. Compared with convex lenses, the maximum temperature of the invented focusing and photoelectric cell while working can be lowered by nearly one hundred centigrades in the same ratio; therefore, the power generation efficiency is rather high. Besides, two actual examples are also provided including a solar energy device with a one-dimensional parallel dioptric lens. The dioptric lens 1 comprises a plurality of saw-tooth shaped dioptric lenses 3 on a glass plate 2. The dioptric lenses 3 are composed of an inclined plane of refraction 4 and an horizontal plane of refraction 5. The rays emitted through the dioptric lens include refraction, but no focus, and the projection formed on the photoelectric cell 6 is a beam. Sun-light is focused through the one-dimensional dioptric lens 1 on the photoelectric cell 6 before being converted into electric energy and thermal energy. The electric energy is output through cables; the thermal energy is exchanged through a heat exchanger 8 for transmission. When the incident angle of sun-light is changed, the photoelectric cell 6 can also move vertically while tracing the light in a focusing plane 7.

Systems, devices, and methods are presented for a prosthetic injectable intraocular lens. The lenses can be made from silicone, fluorosilicone, and phenyl substituted silicone and be semipermeable to air. One or more silicone elastomeric patches located outside the optical path on the anterior side but away from the equator can be accessed by surgical needles in order to fill or adjust optically clear fluid within the lens. The fluid can be adjusted in order to set a base dioptric power of the lens and otherwise adjust a lens after its initial insertion. The elastomeric patches are sized so that they self-seal after a needle is withdrawn. A straight or stepped slit in the patch can allow a blunt needle to more easily access the interior of the lens.

A double aspheric progressive refractive index lens group capable of reducing processing costs. In the double aspheric progressive index lens, the relationship: DHf+DHn<DVf+DVn and DHn<DVn or further the relationship: DVn−DVf>ADD/2 and DHn−DHf<ADD/2 is satisfied. DHf and DVf are respectively designated as the surface refractive index in the horizontal direction and the surface refractive index in the vertical direction at the farsighted power measurement position F1 on the first refraction surface as the object-side surface; DHn and DVn are respectively designated as The surface refractive index in the horizontal direction and the surface refractive index in the vertical direction at the myopia power measurement position N1 on the first refraction surface. The surface glare components at F1 and N1 of the first refractive surface are eliminated by the second refractive surface, the first and second refractive surfaces being combined to provide far vision power (Df) and add power (ADD) based on prescribed values. Therein, the same first refractive surface is used for at least two or more different addition degrees.

A catadioptric imaging optical system with a high numerical aperture and including an effective imaging region shaped optimally for use in a batch type exposure apparatus and having an imaging magnification with a small absolute value. The catadioptric imaging optical system includes a dioptric first imaging system, which forms a first intermediate image based on light from the first plane, a second imaging system, which forms a second intermediate image based on light from the first intermediate image, a third dioptric imaging system, which forms a reduced image on the second plane based on light from the second intermediate image, and a deflecting mirror arranged in an optical path extending from the first imaging system to the second imaging system and an optical path extending from the second imaging system to the third imaging system. The first imaging system and the second imaging system provide a composite imaging magnification having an absolute value β12 of less than 0.55, and the third imaging system has an imaging magnification with an absolute value β3 of less than 0.35.

A progressive power lens includes a convex front surface and a concave back surface which is also a progressive power surface. A pattern including distance and near reference area marks is printed on the concave back surface. The near reference area mark includes a closed curve and a scale arranged outside the closed curve. The closed curve is designed so as to enclose near reference areas of a plurality of progressive power lenses each having different dioptric power. The scale is designed so as to indicate the amount of inset of the progressive power lens.

The invention discloses lenses, glasses and methods for obtaining defocusing amount parameters, ophthalmic dispensing and evaluating an effect. The peripheral defocusing lens comprises a central optical zone, the central optical zone is externally provided with an annular defocusing zone, and the defocusing amount of the defocusing zone varies in the circumferential direction. At least one of a base curve zone and a reverse curve zone of the orthokeratology lens has a structural change in the circumferential direction. The method for obtaining the defocusing amount parameters comprises the steps that the defocusing amount of a plurality of sample points on a dioptric system composed of a myopic patient cornea and the lens or on a user cornea is collected, and the sample points are distributed on a plurality of direction angles in a coordinate system with the cornea center as the origin; and the defocusing amount parameters are obtained according to the defocusing amount of the multiplesample points on the cornea. The method for determining the myopia control effect of the orthokeratology on a myopia patient according to the defocusing amount parameters is further provided.

This invention describes an apparatus and method for generating artificial stars for the simple collimation of catoptric, dioptric, and catadioptric telescopes using a light source along with an appropriate hologram and housing to generate collimated laser beams that enter the front aperture of the telescope. The apparatus of this invention can be fastened to the outside of the telescope aperture. In addition, this invention allows the apparatus position to be adjusted at its tip and tilt axis to center an artificial star under the view of the ocular. The light source illuminates the hologram from some off axis position. Once the hologram is illuminated, the collimated beam emanates from the hologram with a slightly different angle. When these beams are then viewed with the telescope they appear as artificial stars.

A display device (4) for a telescope system is disposed between a first image plane (10) and a second image plane (20) of the telescope system. The display device includes a signal emitter (41), a converging lens group (42) positioned adjacent to the signal emitter, and a dioptric imaging lens group (43) positioned adjacent to the converging lens group. The optical signal emitted by the signal emitter is first transmitted through the converging lens group, then incident onto the dioptric imaging lens group, and finally imaged onto the second image after reflection of the dioptric imaging lens group. Therefore, both the image size and brightness of the displayed signal viewed by the observer can maintain unchanged in spite of the magnification variation of the telescope system.

A catadioptric telephoto lens system which receives incident light rays in a parallel path of both catoptrics and dioptrics, where some of the incident light rays go through a reflective path involving mirrors/reflective surfaces and others of the incident light rays go through a refractive path involving lenses; or receives incident light rays in a serial path of catoptrics and dioptrics, where all the incident light rays initially go through a reflective path involving mirrors/reflective surfaces and then go through a refractive path involving lenses. The system eliminates the black pupil/iris blur disadvantages associated with conventional telescopic lens systems and may be provided in a very compact form.

The invention discloses a variable-focus lens barrel and camera, the lens barrel has a first lens unit located on the side closest to the object, and a cam barrel with first cams, and the first cams alternately and continuously have a a set of variable-focus cam sections that drive the first lens unit to change its power in the direction of the optical axis, and a set of focus cam sections that drive the first lens unit driven by the corresponding variable-focus cam sections , so as to focus in the direction of the optical axis, and the focus cam portion of the first cam that drives the first lens unit is raised less in the direction of the optical axis at the telephoto end than the focus cam that drives the first cam of the first lens unit The amount of lift of the part in the direction of the optical axis at other variable focus positions.

The invention discloses a projection module for applying to transparent glass and capable of multi-angle dioptric imaging. The projection module comprises a control terminal, a projector and imaging glass, wherein the control terminal is electrically connected with and controls the projector; the projector is placed on the back of the imaging glass and used for projecting light beams onto the imaging glass; the front surface of the imaging glass comprises a plurality of triangular transmission gratings; the triangular transmission gratings project the light beams projected on the gratings vertically in the original direction for imaging, and refract the light beams projected on the gratings slantly into two light beams differing in directions for imaging. Through the manner adopted in the projection module, the projection module for applying to transparent glass and capable of multi-angle dioptric imaging has the advantages of wide application, breakthrough of the application limitation of a projection screen, novel structure, multi-angle imaging, and the like, and has a wide market prospect on the popularization of the projection unit for applying to transparent glass and capable of multi-angle dioptric imaging.