80results about How to "Favorably corrected" patented technology

Refractive projection objective with a numerical aperture greater than 0.7, consisting of a first convexity, a second convexity, and a waist arranged between the two convexities. The first convexity has a maximum diameter denoted by D1, and the second convexity has a maximum diameter denoted by D2, and 0.8<D₁/D₂<1.1.

A catadioptric projection objective for projecting a pattern arranged in the object plane of the projection objective into the image plane of the projection objective, having: a first objective part for projecting an object field lying in the object plane into a first real intermediate image; a second objective part for generating a second real intermediate image with the radiation coming from the first objective part; a third objective part for generating a third real intermediate image with the radiation coming from the second objective part; and a fourth objective part for projecting the third real intermediate image into the image plane.

An imaging lens includes: a first lens group; an aperture stop; and a second lens group having a positive refractive power, in this order from an object side. The first lens group includes a negative first lens provided most toward the object side. The second lens group includes a positive lens, provided most toward an imaging surface, and a negative lens having a concave surface and an aspherical surface at least toward the object side. The following Conditional Formulae are satisfied:

0.03<(|Sagsp1|−|Sagas1|)/Re1<0.35; and

1.819≦NdAB

• • wherein Sagsp1 is the sag of a reference spherical surface at the edge of the effective diameter of the object side surface of the negative lens, Sagas1 is the sag of the aspherical surface of the lens, Re1 is the effective diameter of the object side surface of the lens, and NdAB is the average refractive index of the positive lens and the negative lens.

An imaging device comprising a single photographing optical system, an image sensor having a plurality of pixels for obtaining a plurality of viewpoint images by photo-electrically converting a luminous flux passing through different regions of the photographing optical system, and a shading correction part for conducting a shading correction to the plurality of viewpoint images. The shading correction part varies the amount of shading correction based on light-reduction property for one viewpoint image among the plurality of viewpoint images with respect to the amount of shading correction based on light-reduction property for the other viewpoint image among the plurality of viewpoint images.

A method for forming a patterned microelectronics layer employing electron beam lithography in a sensitive material upon a substrate with optimal correction for proximity effects resulting from electron back scattering into the resist material. There is provided a substrate having formed thereon a layer of resist material sensitive to electron beam exposure. There is then exposed the sensitive layer to a vector scan shaped electron beam to write a primary pattern with dose correction of the beam dose for proximity effects due to electron scattering at each point in the primary pattern. There is then written a secondary pattern which is a negative reversed image of the primary pattern in a secondary exposure employing a vector scan shaped focused electron beam at an exposure dose substantially below the primary beam dose, there being provided a gap between the primary pattern and the secondary pattern. There is then developed the primary pattern in the sensitive resist layer to form the final corrected pattern on the substrate. The patterned layer of resist material may be employed directly on the substrate on which it is formed, or alternatively the patterned resist layer may be employed formed over an opaque layer upon the transparent substrate and subsequently the pattern etched into the opaque layer to form a photomask.

A three-group zoom lens includes five lens components and six lens elements. The first lens group from the object side has negative refractive power and both the second lens group, which includes a stop, and the third lens group from the object side have positive refractive powers. The first and second lens groups each include an aspheric surface. During zooming, the first lens group moves nearer the second lens group while the second lens group moves farther from the third lens group. The third lens group moves toward the object side when focusing from an object at infinity to a nearby object. The three lens groups have particular lens element constructions, and lens elements of the second and third lens groups satisfy certain conditions related to their focal lengths, Abbe numbers, and the focal length of the zoom lens.

A zoom lens for a projection display device includes, in order from the enlarging side, a first lens group having negative refractive power and that is stationary during zooming, second and third lens groups having positive refractive power, a fourth lens group that has refractive power that is much weaker in absolute value than the refractive powers of the other lens groups, and a fifth lens group having positive refractive power and that is stationary during zooming. The second, third, and fourth lens groups move with coordinated movements continuously toward the enlarging side during zooming from the wide-angle end to the telephoto end of the zoom range. The zoom lens satisfies certain conditions related to focal lengths of the zoom lens and lens groups and distances along the optical axis. A projection display device uses the zoom lens.

A treatment device for the surgical correction of defective vision in an eye. The device includes a laser apparatus controlled by a controller. The controller determines a desired correction of defective vision from measurement data of the eye to produce control data for the laser, and to control the laser to emit radiation according to the control data, such that a lenticule-shaped volume is isolated in the cornea. The controller computes a lenticule-shaped intended volume, the removal of which from the cornea leads to an actual correction of defective vision in an optical zone in the eye which differs from the desired correction more at the edge of the optical zone than at the center of the optical zone. The thickness of the lenticule-shaped intended volume is less than the thickness of a lenticule-shaped comparison volume, the removal of which would bring about the desired correction of defective vision.

Provided is a retrofocus type optical system including a lens or a layer made of a material satisfying the following conditions of the Abbe constant νd and partial dispersion ratios θgd and θgF,

νd<30,

θgd<−3.333×10⁻³·νd+1.40,

θgF<−2.615−10⁻³·νd+0.67.

In the case that this layer is disposed on the front side of the aperture stop, the layer is designed to have a positive refractive power, and in the case that the layer is disposed on the rear side of the aperture stop, the layer is designed to have a negative refractive index.

The invention relates to a zoom lens and an imaging apparatus incorporating the same, and more particularly to a zoom lens of small format that lends itself to imaging apparatus inclusive of video cameras and digital cameras. The zoom lens comprises, in order from its object side, a first lens group G1 of positive refracting power, a second lens group G2 of negative refracting power and a third lens group G3 of positive refracting power. Zooming is implemented by changing the space between the respective lens groups. The first lens group G1 comprises one negative lens and one positive lens in order from the object side. The zoom lens satisfies conditions (1) and (2):

5.0<f_t/f_w<50.0  (1)

1.4<N_d1p<1.7  (2)

where f_w is the focal length of the whole zoom lens system at a wide-angle end, f_t is the focal length of the whole zoom lens system at a telephoto end, and N_d1p is the d-line refractive index of the positive lens in the first lens group.

A high magnification, four-group zoom lens formed of only four lens groups, namely, a first lens group of positive refractive power, a second lens group of negative refractive power, and third and fourth lens groups of positive refractive power. The first lens group includes, in order from the object side, a first lens subgroup that is fixed during focusing and a second lens subgroup that moves during focusing. The second lens group includes, in order from the object side, first and second lens elements having negative refractive power, and first and second doublet components with each formed of a lens element having positive refractive power and a lens element having negative refractive power. To suppress lateral color, specified conditions are satisfied for the Abbe numbers and the refractive indices of the positive refractive power lens elements that are included in the doublet components of the second lens group.

A device manufacturing method using lithographic apparatus, in which method a patterned beam of radiation is projected on to a target portion of a substrate. Prior to exposing the substrate to the patterned beam of radiation a beam of compensating radiation is irradiated on to a predetermined area of the substrate, the beam of compensating radiation having an intensity which varies across said predetermined area. In the described embodiment the beam of compensating radiation is applied to an annular edge region of the substrate and has an intensity which is tilted across the cross-section of the beam so as to increase or decrease in intensity towards the edge of the substrate. This is done to improve the critical dimension (CD) uniformity across the substrate.

A three-group zoom lens includes first, second, and third lens groups, of negative, positive, and positive or negative refractive power, respectively. The second lens group includes a stop and the third lens group moves for focusing. When zooming from the wide-angle end to the telephoto end, the first and second lens groups become closer together. The zoom lens preferably satisfies specified conditions that ensure compactness, ease of manufacture, and favorable correction of aberrations. The zoom lens includes aspheric lens elements with lens surfaces defined by an aspheric lens equation that: (a) includes at least one non-zero coefficient of an even power of Y, and at least one non-zero coefficient of an odd power of Y, where Y is the distance of a point on the aspheric lens surface from the optical axis, and/or (b) includes at least one non-zero coefficient of Yⁱ, where i is even and 16 or greater.