4results about How to "Reduce Tolerance Sensitivity" patented technology

The application discloses a high-resolution optical system for cosmetic removal and color cosmetic detection, comprising seven aspheric lenses, which are a diaphragm, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens from an object plane to an image plane. The application combines positive and negative lenses, reasonably allocates the refractive power of each lens, and makes light transition gently, so that the tolerance sensitivity of the system is significantly reduced, chromatic aberration, spherical aberration, field curvature and distortion are effectively corrected, the resolution and relative luminance are improved, the high-resolution optical system for cosmetic removal and color cosmetic detection has sufficient light flux, high resolution, and unobvious field curvature and distortion, and all the lenses are made of plastic, so that the cost is low and mass production is easy.

The present application belongs to the technical field of barrier segmentation, and particularly relates to a frontal crash barrier segmentation method based on vehicle front structure data. First, a force wall crash database of a target vehicle model is constructed, and a deformation crush area of the target vehicle model is calculated based on a force wall crash curve in the force wall crash database to represent an X-direction barrier segmentation scheme. Then, a vehicle front structure database of the target vehicle model is constructed, and off-the-ground height data of a vehicle front energy absorption component is screened based on the vehicle front structure database to represent a Z-direction barrier segmentation scheme. Finally, an initial vehicle barrier is constructed based on the X-direction barrier segmentation scheme and the Z-direction barrier segmentation scheme, and the crash side and the opposite side of the initial vehicle front barrier are subjected to corner cutting processing to generate a final vehicle barrier. The present application can solve the problem that the existing frontal crash barrier cannot well represent the real vehicle front structure.

The application discloses a low-tolerance and high-sensitivity large-view-field main-focus astronomical optical system, which comprises a main mirror, a correcting mirror A, a correcting mirror B, a correcting mirror C, a correcting mirror D, a correcting mirror E, a correcting mirror F and a focal plane; wherein light is reflected by the main mirror, and then sequentially passes through the correcting mirror A, the correcting mirror B, the correcting correcting mirror C, the correcting mirror D, the correcting mirror E and the correcting mirror F to reach the focal plane; the main mirror is a concave aspheric mirror, and the surface shape is a quadratic hyperboloid or a high-order aspheric surface. The application realizes low machining and assembling tolerance sensitivity while ensuring excellent large-view-field imaging of the main-focus optical system; through analyzing the distribution of aberration on each optical surface, the position and structure parameters of special glass materials and the optical power of optical elements are optimized, the average of the contribution of each optical surface aberration is realized, and thus the machining and assembling tolerance sensitivity is reduced.

The patent discloses a large-angle medical capsule endoscope optical system, and belongs to the optical lens field, which comprises first lens elements (L1), second lens elements (L2), optical filters (IR), light barriers (STO), third lens elements (L3), fourth lens elements (L4) and fifth lens elements (L5) arranged in sequence from an object plane to an image plane; and the focal lengths of the lens elements satisfy the following relationships: -135.02 < f1 / f < -138.73; -1.652 < f2 / f < -1.926; 1.349 < f3 / f < 1.682; 1.228 < f4 / f < 1.619; -1.346 < f5 / f < -1.304. The large-angle medical capsule endoscope optical system has good depth of field, small aperture, good tolerance, small distortion, and comparable resolution in liquid and air.