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The focus behaviors, intensity and distance, of the sonic crystal plane lens with varying temperature are studied.
By using the negative refraction behavior, we can design a sonic crystal plane lens to focus a sonic wave.
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Utilizing a range of 15 existing Mamiya 645AF focal plane lenses, the Mamiya DM22 and DM28 offer many of the features found on their higher-end siblings.
Photograph: Darren Staples/Reuters 3.10pm BST A variable planed lens has been used here to make Carl Hester of Great Britain riding Uthopia look like he's in a model of Greenwich Park rather than the real thing as he competes in the Dressage Grand Prix.
Photograph: Eranga Jayawardena/AP 4.53pm BST This image was created using a variable planed lens and shows a general view of the hockey centre as Great Britain plays against New Zealand during the first half of the women's hockey bronze medal match.
A high coupling efficiency, simple structure refractive lens was designed; a hyperboloid cylinder-plane lens was proposed to reduce the divergence angle of the laser diode array beam in the fast axis direction.
The further away from the sensor/film plane the lens is, the more light you will need.
A technique was developed for highly revealing real-time imaging of the entire iris and the pupil in coronal or near-coronal planes without lens interference.
In this work, we generalise the relationship between ray aberration and wave aberration for a biaxial imaging system that includes holographic optical elements (HOEs); both for conjugate planes perpendicular to optical axis or parallel to lens plane.
This paper reports the design, simulation, fabrication and characterization of a piezoelectric actuation structure for out-of-plane micro-lens movement.
BCD, or back center distance, is the longitudinal distance in a meridional plane from the lens center to where a laser beam deflected by the lens intercepts the optical axis.
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