65results about How to "Achieving Auto Focus" patented technology

The invention relates to an optical system with a replaceable lens set. The optical system is technically characterized by comprising a focus lens set, the replaceable lens set with the focuses capable of being replaced into different focuses and composed of at least one lens is arranged on one side of the focus lens set, an optical filter is arranged on one side of a focus fixed lens set, and an imaging face is arranged on one side of the optical filter. The invention further relates to an optical lens of the replaceable lens set applied to the optical system. The optical lens is technically characterized by comprising a focus lens cone, the focus lens set is arranged in the focus lens cone, an optical filter is arranged on one side of the focus lens set, an imaging face is arranged on one side of the optical filter, the focus lens cone is sleeved with a fixed cone frame, a replaceable lens cone is detachably arranged at one end of the fixed cone frame, the replaceable lens set is arranged in the replaceable lens cone, and a driven part which can be driven to drive the focus lens cone to get close to or get away from the replaceable lens set is arranged between the fixed cone frame and the focus lens cone. The optical system and the optical lens are simple in structure, and different shooting effects can be achieved by replacing the replaceable lens set.

The present invention relates to a radar system comprising a platform (10) movable along a path in relation to a ground surface portion (20) and carrying a positioning device, a timing device and a radar equipment (1). It is adapted to implement SAR for imaging the ground portion. It includes recording means for collecting radar raw data comprising radar echo amplitudes annotated with distance and the moment of time of collection and being intertwined with platform position measurement data annotated with the respective moment of time of collection thereof. It also comprises processing means (3,4) for SAR processing using the collected radar raw data and position measurement data, and being adapted to calculate, by iteration, a sequence of summations of length k of radar amplitudes, annotated with distance and angular parameters, defined with respect to a common origin in 3-dimensional space defined at a location along a vector formed by the vector sum PQPI + PiP2 +... + P^iPfc of k connected 3-dimensional vectors PQPJ, -PjP2V -5 Pk-I-Pk . Each vector (subaperture) contains a respective origin of each radar amplitude term in the summation, and the processing means are adapted to initiate the iteration process in a first iteration stage by regarding radar raw data as the radar amplitudes, where these radar data have their origins along vectors starting and ending in 3-dimensional points given by the positioning measurements.

The invention discloses a focusing method, which comprises the steps of if it is detected that a scene picture is changed, determining a change interval corresponding to the scene picture; calculatinga central distance between the change interval and the scene picture on a preset time axis, and determining a change trend of the change interval based on the central distance; and determining a corresponding focusing strategy based on the change interval and the change trend, and moving a focus for focusing based on the focusing strategy. The invention further discloses a focusing device and equipment and a computer readable storage medium. According to the invention, after the change of the scene picture is detected, the focusing strategy is determined by determining the change interval andthe change trend of the change interval, and the rapid automatic focusing is realized by combining an evaluation value.