5 results about "Lens array" patented technology

A lens array (7) has a plurality of frusto-spherical convex lenses (14, 15), formed in an optical entry surface (8) and an optical exit surface (9), focusing light rays (18, 19) near the center between each lens pair (14a, 15a) in an area (20) where the laser energy is focused sufficiently to induce vaporization resulting in aerosol breakdown which will absorb 99% or more of the laser energy, and thereby protect high gains optical equipment or eyes from optical damage.

The invention discloses a method and a device for measuring a multimode perfect vortex beam. Each ring information of the multimode perfect vortex beam is segmented by using the fan-shaped micro lensarray which is annularly arranged, and the size and the symbol of each mode are solved through closed curve integration. After the multimode perfect vortex beam enters the fan-shaped micro lens array,an annularly distributed light spot array is obtained on a focal plane, then circumferential scanning is started from the central position of the light spot array, the closed curve and the corresponding phase slope of the ring are determined every time the ring is scanned, and finally the closed curve and the corresponding phase slope are substituted into closed curve integration to obtain a result. According to the method, data classification and processing are easier, and the measurable mode range is larger; the method is simple in structure and convenient and fast in measurement, and has agreat application prospect in the fields of free space optical communication, optical fiber communication, optical tweezers technology and the like.

The invention provides a portable snapshot array polarization multispectral imager and an imaging method in order to solve the problems that an existing snapshot array polarization multispectral imager is large in size and complex in restoration algorithm. The portable snapshot array polarization multispectral imager comprises a lens array, a multiband and polarization filter, a relay imaging coupling lens and a focal plane detector which are sequentially arranged along the same light path, the lens array is composed of m * n lenses, m > = 3, and n > = 3. Images formed by different lenses arenot overlapped. The multiband and polarization filter is an optical filter/film array composed of P spectral filters/films with different spectral bands and Q polarization filters/films with differentangles, P + Q = m * n, and Q = 3 or 4; wherein the Q polarization filters are in one-to-one correspondence with any Q lenses in the lens array, and the P spectrum filters are in one-to-one correspondence with the rest m * n-Q lenses in the lens array; and the relay imaging coupling lens is used for coupling an image formed by the lens array to the focal plane detector.