8 results about "Cylindrical power" patented technology

The system includes a series of contact lenses having at least one cylindrical power across a plurality of spherical powers, each lens having a stabilization region positioned on the front surface outside the viewing region. For each cylindrical power within the series there is a set of lenses comprising: a first lens having only a spherical power in the central optical region and having a first maximum thickness of a stable region, and a second lens having a second maximum thickness of a stable region; the first maximum thickness is designed such that a first population with a first eyelid pressure provides a predetermined angular recovery response and rotational stability on the eyes; and the second lens has first spherical focal power and second spherical focal power so as to correct presbyopia. The second lens has a maximum thickness greater than the first thickness, the maximum thickness being designed such that a second population having an eyelid pressure less than or equal to 70% of the first eyelid pressure provides an angular recovery response and rotational stability at least as good as the predetermined angular recovery response and rotational stability of the first lens.

1. Name of the product in this design: Intelligent Surface Measuring Instrument. 2. Purpose of this design: To measure and test the optical properties of lenses, such as spherical power, cylindrical power, and prism power. 3. The key design points of this product are: the shape of design 1, and the shapes, colors, and combinations of design 2 and 3. 4. The picture or photo that best illustrates the key design points: Design 1 3D diagram 1. 5. Design 1 is designated as the basic design. 6. Other situations requiring explanation: Other explanation: Designs 2 and 3 for which protection is sought include color.

The utility model relates to the technical field of mechanical manufacturing, and provides a cylinder sleeve convenient to machine, which comprises an upper cylinder barrel and a lower cylinder barrel, a horn hole is arranged at one end of the upper cylinder barrel, threads are fixedly connected to the inner surface of the horn hole, a circular truncated cone is fixedly connected to the outer surface of the lower cylinder barrel, and a spiral groove is arranged on the outer surface of the circular truncated cone. The side, close to the horn hole, of the upper cylinder barrel and the end, close to the circular truncated cone, of the lower cylinder barrel are each provided with a plurality of dovetail grooves, a pair of dovetail grooves in the same horizontal direction are formed in the outer surfaces of the upper cylinder barrel and the lower cylinder barrel, and dovetail pins are movably embedded in the multiple pairs of dovetail grooves correspondingly to divide the long cylinder sleeve into the upper cylinder barrel and the lower cylinder barrel. And then the upper cylinder barrel and the lower cylinder barrel form a longer cylinder sleeve through threaded connection and tenon-and-mortise connection of the dovetail pin, so that the longer cylinder sleeve can be conveniently machined, precision indexes such as cylindricity, roundness and straightness of the whole cylinder sleeve are ensured, the machining precision is ensured, and the machining difficulty is reduced.

The application discloses a pointing mirror assembly and a bonding tool thereof, and relates to the technical field of space laser communication. The pointing mirror adopts a back convex cylindrical structure form, improves the rigidity of the bonding part of the mirror body, improves the anti-deformation capability, and provides sufficient operation space for the tool at the back. The flexible joint is locally bonded with the mirror body, and a force releasing lever is formed from the bonding point to the inner flexible groove root, so that the shrinkage deformation of the glue layer is released, the bonding stress is reduced, and the bonding stress caused by the continuous bonding of the whole circumference of the outer cylindrical surface is avoided. In addition, the circumferential material of the bonding point is continuous, the bonding surface cylindricity and local rigidity are easy to control, the uniformity of the glue layer is easy to guarantee, and the pointing mirror position stability under vibration is stable. The external interfaces are far away from each other, and the unevenness influence is weakened. By selecting appropriate bonding layer thickness adhesive and using the tool plug, the two bonding parts do not need to be precisely machined and matched. After bonding, the assembly precision and consistency are high, the subsequent whole machine adjustment is facilitated, and the space environment working condition requirements are met.

The system includes a series of contact lenses having at least one cylindrical power across a plurality of spherical powers, each lens having a stabilization region positioned on the front surface outside the viewing region. For each cylindrical power within the series there is a set of lenses comprising: a first lens having only a spherical power in the central optical region and having a first maximum thickness of a stable region, and a second lens having a second maximum thickness of a stable region; the first maximum thickness is designed such that a first population with a first eyelid pressure provides a predetermined angular recovery response and rotational stability on the eyes; and the second lens has first spherical focal power and second spherical focal power so as to correct presbyopia. The second lens has a maximum thickness greater than the first thickness, the maximum thickness being designed such that a second population having an eyelid pressure less than or equal to 70% of the first eyelid pressure provides an angular recovery response and rotational stability at least as good as the predetermined angular recovery response and rotational stability of the first lens.

The invention relates to an ophthalmic lens (10) having a rotating point and a vertical line (VL) passing through said rotating point, and providing at a far vision point (FVP) at least a non-zero cylindrical power oriented according to a nominal cylinder axis relative to said vertical line and in a near vision area (11) a non-zero addition of spherical power. According to the invention, said ophthalmic lens is suitable for a range of prescriptions of cylinder axis of at least 20° about said nominal cylinder axis.

The system comprises three optical elements arranged along an optical axis, each optical element having a different cylindrical axis and a variable cylindrical power. The three elements together form a composite optical element having an overall spherical power (SPH), a cylindrical power (CYL) and a cylindrical axis (Axis) which can be varied according to a prescription (Rx).

The invention discloses a pointing mirror assembly and a bonding tool thereof, and relates to the technical field of space laser communication. The pointing mirror adopts a cylindrical structure with a convex back, so that the rigidity of the mirror body at the bonding part is improved, the deformation resistance is improved, and meanwhile, a sufficient operation space is provided for the back to adapt to a tool. The flexible joint is locally bonded with the mirror body, and a force unloading lever is formed from the bonding point to the root of the flexible groove on the inner side, so that curing shrinkage deformation of the adhesive layer is released, the bonding stress is reduced, and the situation that the bonding stress is nowhere to be released due to full-circumference continuous bonding of the outer cylindrical surface is avoided. In addition, circumferential materials of bonding points are continuous, cylindricity and local rigidity of a bonding surface are easy to control, and uniformity of an adhesive layer and stability of location degree of the pointing mirror under vibration are guaranteed. External interfaces are far away from each other, so that the unevenness influence is weakened. And an adhesive with a proper adhesive layer thickness is selected, and a tool plug block is utilized, so that two adhesive pieces do not need to be subjected to finish turning assembly. And the precision and the consistency of the bonded assembly are high, subsequent whole machine assembling and adjusting are facilitated, and meanwhile the space environment working condition requirements are met.