Patent application number | Description | Published |
20080239506 | VARIABLE-POWER OPTICAL SYSTEM AND IMAGING DEVICE - A variable-power optical system includes, in order from an object side, first to fifth lens groups. The first and third lens groups are fixed at a time of varying magnification and at a time of focusing. The second, fourth and fifth lens groups are movable at the time of varying magnification. The first, third and fourth lens groups have positive refractive powers. The second and fifth lens groups have negative refractive powers. The fourth lens group has a focusing function. The following conditional expressions are satisfied. | 10-02-2008 |
20090129241 | OBJECTIVE LENS, OPTICAL PICKUP DEVICE HAVING THE SAME, AND RECORDING AND/OR REPRODUCING APPARATUS FOR OPTICAL RECORDING MEDIUM, EQUIPPED WITH THE OPTICAL PICKUP DEVICE - An objective lens consists of a single lens element, and has a light source side surface formed into a convex surface having a large curvature and an optical recording medium side surface has a small curvature. The both surfaces are aspheric surfaces. Also, the objective lens satisfies the following expressions (1) to (3): | 05-21-2009 |
20090129242 | OBJECTIVE LENS, OPTICAL PICKUP DEVICE HAVING THE SAME, AND RECORDING AND/OR REPRODUCING APPARATUS FOR OPTICAL RECORDING MEDIUM, EQUIPPED WITH THE OPTICAL PICKUP DEVICE - An objective lens | 05-21-2009 |
20090129243 | OBJECTIVE LENS, OPTICAL PICKUP DEVICE HAVING THE SAME, AND RECORDING AND/OR REPRODUCING APPARATUS FOR OPTICAL RECORDING MEDIUM, EQUIPPED WITH THE OPTICAL PICKUP DEVICE - An objective lens consists of a single lens element. A light source side surface is formed into a convex surface having a large curvature, and an optical recording medium side surface has a small curvature. The both surfaces are formed into aspheric surfaces. Also, the objective lens satisfies the following expressions (1) to (3): | 05-21-2009 |
20090273846 | ZOOM LENS SYSTEM AND IMAGING APPARATUS - A positive first lens group G | 11-05-2009 |
20090285078 | OBJECTIVE LENS, OPTICAL PICKUP DEVICE, AND OPTICAL RECORDING/REPRODUCING APPARATUS - An objective lens for converging light emitted from a light source onto an optical recording medium to record and reproduce information consists of a single lens that has at least one aspheric surface. The following conditional expressions (1) and (2) are satisfied: | 11-19-2009 |
20090285079 | OBJECTIVE LENS, OPTICAL PICKUP DEVICE, AND OPTICAL RECORDING/REPRODUCING APPARATUS - An objective lens for converging light emitted from a light source on an optical recording medium to record and reproduce information consists of a single lens having at least one aspheric surface. The following conditional expressions ( | 11-19-2009 |
20090296227 | MOLDED LENS - A laser beam output from a semiconductor laser light source | 12-03-2009 |
20100134900 | ZOOM LENS AND IMAGING APPARATUS - A zoom lens is provided and includes: a first lens group having a positive power, a second lens group having a negative power, a stop, a third lens group having a positive power, and a fourth lens group having a positive power in order. Zooming is performed by moving at least the first lens group, the second lens group, the stop, and the third lens group along the optical axis. During zooming, the stop is moved so as to be closer to an image plane at a wide-angle end than at a telephoto end and to be closer to the second lens group at the telephoto end than at the wide-angle end. The following conditional expressions (1) and (2) are satisfied. For the conditional expressions (1) and (2), fw is a focal length at the wide-angle end of the entire system, ft is a focal length at the telephoto end of the entire system, f | 06-03-2010 |
20110019033 | ZOOM LENS AND IMAGING APPARATUS - Disclosed are a zoom lens and an imaging apparatus having a high zoom ratio, a small total length, and a small overall size. | 01-27-2011 |
20110080646 | MOLDED LENS - A laser beam output from a semiconductor laser light source | 04-07-2011 |