Konica Minolta Opto, Inc.

Konica Minolta, Inc.

Canon Kabushiki Kaisha

Nikon Corporation

Konica-minolta Holdings, Inc.

Keiko Yamada

Masayuki Imaoka

Kohtaro Hayashi

Soh Ohzawa

Eigo Sano

Yoshihito Souma

Haruo Sato

Kenji Konno

Keiji Matsusaka

Seiji Ogawa

Masashi Isono

Yoshie Shimizu

Hiroaki Tanaka

Wataru Tatsuno

Junko Morikawa

Taizo Wakimura

Ryosuke Imajima

An electronic apparatus including a first lens and a second lens at a first side, the second lens having a angle of view different from that of the first lens, includes a switching unit configured to switch first imaging via the first lens and second imaging via the second lens, and a control unit configured to control display of items corresponding to a plurality of respective imaging modes, wherein the control unit is configured to, in a case where the second imaging is being performed, control display of a first item and a second item in different display modes, the first item corresponding to an imaging mode that enables the first imaging and the second imaging, the second item corresponding to an imaging mode that enables the first imaging and disables the second imaging.

Electronic apparatus and method for controlling same to facilitate imaging mode selection

An imaging lens comprises in order from an object, a first lens group of positive refractive power, a second lens group of positive refractive power, and a third lens group of negative refractive power. In focusing from infinity to a close object, the first lens group is fixed in position, and the second lens group and the third lens group are moved so that the distance between the first lens group and the second lens group is reduced, and the distance between the second lens group and the third lens group is increased. Further, the following conditional expression (1) is satisfied:1.0&#x3c;1/&#x3c;2.5&#x2003;&#x2003;(1)

Imaging lens, imaging optical device, digital device, and method of manufacturing imaging lens

A variable-magnification optical system has five lens groups, namely, from object side, positive, negative, positive, positive, and negative lens groups, and achieves magnification variation by varying all axial distances between the lens groups. Focusing is achieved by moving the fourth lens group along an optical axis. Vibration correction is achieved by moving all or part of the fifth lens group perpendicularly to the optical axis. Fulfilled are formulae 4.0&#x3c;|f1/f2|&#x3c;6.0, 1.0&#x3c;f4/f1&#x3c;1.5, and 2.0&#x3c;|f4/fv|&#x3c;4.0, f1 representing a focal length of the first lens group, f2 a focal length of the second lens group, f4 a focal length of the fourth lens group, and fv a focal length of the vibration correction group.

Variable-magnification optical system, imaging optical device, and digital appliance

An image-capturing optical system includes: a positive first lens group; and a positive second lens group, wherein the positive first lens group and the positive second lens group are arranged in order from an object side in the image-capturing optical system, the image-capturing optical system focuses on a close object by moving the second lens group as a whole along a light axis toward the object side, a lens closest to the object side in the second lens group has a convex surface facing the object side, a lens closest to an image side in the second lens group is a positive meniscus lens having a convex surface facing the image side, the image-capturing optical system satisfies following condition expressions (1) to (3)2.2&#x3c;1_&#x3c;3.8&#x2003;&#x2003;(1)0.9&#x3c;2_&#x3c;1.5&#x2003;&#x2003;(2), and0.45&#x3c;1__/1_&#x3c;0.85&#x2003;&#x2003;(3).

Image-capturing optical system, image-capturing optical apparatus and digital device

An imaging optical system includes first to third lens groups, and performs focusing by moving the second lens group, to satisfy the following conditional expressions:0.8&#x3c;1_&#x3c;1.2,0.6&#x3c;|2_|&#x3c;2.5,0.6&#x3c;3_&#x3c;1.80.8&#x3c;1__/1_&#x3c;1.1, and&#x2212;0.6&#x3c;2__/2_&#x3c;1.6where FL, 1Gr_Fl, 2Gr_Fl, and 3Gr_Fl represent focal lengths of the entire system, and the first to third lens groups, respectively, 1Gr_R_nop represents a distance from the outermost surface of the first lens group on the object side to a rear principal point of the first lens group, 1Gr_Thi represents a total length of the first lens group, 2Gr_R_nop represents a distance from the outermost surface of the second lens group on the object side to a rear principal point of the second lens group, and 2Gr_Thi represents a total length of the second lens group.

Imaging optical system, imaging optical device, and digital apparatus

A variable-magnification optical system has five lens groups, namely, from object side, positive, negative, positive, positive, and negative lens groups, and achieves magnification variation by varying all axial distances between the lens groups. Focusing is achieved by moving the fourth lens group in optical axis direction. Vibration correction is achieved by moving all or part of the fifth lens group perpendicularly to optical axis. Fulfilled are formulae 4.0&#x3c;|f1/f2|&#x3c;6.0, 1.0&#x3c;f4/f1&#x3c;1.5, and 2.0&#x3c;|f4/fv|&#x3c;4.0, f1 representing a focal length of the first lens group, f2 a focal length of the second lens group, f4 a focal length of the fourth lens group, and fv a focal length of the vibration correction group.

Variable magnification optical system, imaging optical device, and digital appliance

Provided is an image pickup lens that despite being small is favorably corrected for aberrations and has a five element configuration that is wide angle and has a bright F-number also provided is an image pickup device and a portable terminal using the image pickup lens. The image surface side of the fifth lens has an aspherical shape, has an inflection point at a position other than a position that intersects with the light axis, and satisfies the following formulae: &#x2212;5.0&#x3c;(r1+r2)/(r1&#x2212;r2)&#x2266;&#x2212;1.0 (1); 0.90&#x3c;f1/f&#x3c;1.70 (2); 0.35&#x3c;&#x3a3;DL13/f&#x3c;0.55 (3). Provided that r1: curvature radius of the first lens object side surface, r2: curvature radius of the first lens image side surface, f1: focal distance of the first lens, f: focal distance of the entire image pickup lens system, &#x3a3;DL13: distance on the optical axis from object side surface of the first lens to image side surface of the third lens.

Image pick-up lens, image pick-up device, portable terminal and digital instrument

An imaging lens system includes, from the object side, an aperture stop, a positive first lens convex to the object side, a negative second lens, a positive third lens convex to the object side, a positive meniscus fourth lens convex to the image side, and a negative biconcave fifth lens, and fulfills the conditional formulae 0.8&#x3c;f/f1&#x3c;1.30, 0.5&#x3c;f4/f1&#x3c;0.90, 0.6&#x3c;d4/d3&#x3c;2.0, and 0.80&#x3c;R3_1/f&#x3c;2.20, where f is the focal length of the entire imaging lens system, f1 and f4 are the focal lengths of the first and fourth lenses, d3 is the axial thickness of the second lens, d4 is the axial aerial distance between the second and third lenses, and R3_1 is the radius of curvature of the object-side surface of the third lens on the optical axis.

Imaging lens system

Provided is a single-focus optical system which is configured, in order from the object side to the image side, of a first to third lens groups and in which the first lens group and the third lens group are fixed with respect to a predetermined imaging surface, and the second lens group is moved in the optical axis direction to focus, wherein the first lens group comprises at least one positive lens and at least one negative lens, the second lens group comprises at least one positive lens, the third lens group comprises at least one lens having at least one aspheric surface and having a positive optical power at a peripheral portion thereof and 5&#x3c;|&#x394;v1|&#x3c;70 is satisfied where &#x394;v1 is a maximum value of the Abbe number difference between the positive lens and the negative lens in the first lens group.

Single-focus optical system, image pickup device, and digital apparatus

A video image display device () is provided with an ocular optical system () that guides video image light from a display element () to the pupil of an observer through an ocular prism () and at the same time guides ambient light to the pupil of the observer through the ocular prism (). The eyepiece optical system () has reflection planes set in the ocular prism () that are provided with three or more planes to fold down three or more times an optical path for the video image light from the display element (), wherein an HOE () is formed on at least one plane of the reflection planes. The video image display device () satisfies a conditional equation that properly prescribes the relationship between an incident range of the video image light incident on the HOE () formed plane in the ocular prism () and a display screen size of the display element (). Thus, the video image display device () can widely secure both a video image observation area and a see-through area with a small compact structure.

Image display device and head-mounted display

An image pickup optical system OP includes first and second prisms P, Pfor bending incident light at an almost right angle. Optical axis AX at the incident surface of first prism Pand optical axis AX at the outgoing surface of second prism Pare almost parallel with each other. There is a lens element forming at least one power group on the optical path between first and second prisms P, P, wherein a power group closest to the incident surface of second prism Pis a positive power group. The incident surface of second prism Phas a concaved surface shape facing the object side, and the following conditional expressions are satisfied: &#x2212;4.2&#x3c;fp2/f&#x3c;&#x2212;0.2 (fp2: a focal length of the second prism, f: is a focal length of the entire image pickup optical system), and 0.2&#x3c;|f_1p/fp2|&#x3c;1.5 (f_1p: a focal length of the power group closest to the incident surface of the second prism).

Image pickup optical system, image pickup optical device, and digital equipment

A projection optical system receives light from a display device surface and enlarges and projects a display image thereon onto a screen surface. The projection optical system includes one or more reflective surfaces having an optical power between the display device surface and the screen surface, moves at least one optical device having an optical power to adjust focus and satisfies the following conditional formula: &#x2212;0.02&#x3c;{(&#x3b4;1&#x2212;&#x3b4;2)&#x3b2;2}/{(&#x3b4;1+&#x3b4;2)&#x3b2;1}&#x3c;0.2 where &#x3b4;1 and &#x3b4;2 represent, when the absolute value of a projection magnification is the highest and the lowest, respectively, during focus adjustment, the absolute value of a difference between a distance from the exit pupil of rays incident on the screen upper ends of the screen surface to the screen surface and a distance from the exit pupil of rays incident on the screen lower ends of the screen surface to the screen surface and &#x3b2;1 and &#x3b2;2 represent the maximum value and minimum value, respectively, of the projection magnification when focus is adjusted.

Projection optical system

A two-dimensional image is displayed on a screen (SC) by scanning the screen (SC) two-dimensionally with light beams from a laser light source () that are deflected to orthogonally-intersecting first and second scanning directions by means of a mirror () in a deflection apparatus (). The deflection apparatus () is arranged to incline obliquely in the second scanning direction (e.g. vertical direction) lower in a scanning speed than the first scanning direction (e.g. horizontal direction), and performs an oblique projection onto the screen (SC). Assuming a direction in which the incidence angle of a light beam deflected by the deflection apparatus () and entering the screen (SC) increases in the second scanning direction is positive side, the light beam from the laser light source () impinges on the deflection apparatus () from the negative side in the second scanning direction, and the normal to the mirror () in the deflection apparatus () in a state where the center of the screen is displayed inclines to the negative side in the second scanning direction with respect to the normal to the screen (SC).

Laser projector

A projection optical system satisfies a conditional formula: 0.01&#x3c;{(tan &#x3b8;f1&#x2212;tan &#x3b8;f2)&#x2212;(tan &#x3b8;n1&#x2212;tan &#x3b8;n2)}&#xb7;(&#x3b2;2/&#x3b2;1)&#x3c;0.20 where the direction of a normal to and the direction of a long side of the screen of the screen surface are referred to as a 'z-direction' and an 'x-direction', respectively, the x-z plane component of the angle of incidence with respect to the screen surface is referred to as an &#x201c;incident angle &#x3b8;&#x201d; and when, among rays that pass through the center of an aperture and that are incident on the ends of the upper and lower sides of the screen of the screen surface, the incident angle &#x3b8; of rays whose incident angle &#x3b8; is larger is referred to as &#x201c;&#x3b8;f&#x201d; and the incident angle &#x3b8; of rays whose incident angle &#x3b8; is smaller is referred to as &#x201c;&#x3b8;n&#x201d;, &#x3b8;n and &#x3b8;f2 respectively represent, when the absolute value of a projection magnification is the highest or lowest during focus adjustment, the incident angle &#x3b8;f, &#x3b8;n1 and &#x3b8;n2 respectively represent, when the absolute value of the projection magnification is the highest or lowest during focus adjustment, the incident angle &#x3b8;n, and &#x3b2;1 and &#x3b2;2 respectively represent the maximum and minimum values of the projection magnification during focus adjustment (except that &#x3b2;1 and &#x3b2;2 respectively represent, if the projection magnification is negative, a value of the projection magnification when the absolute value thereof is the highest or lowest).

An oblique projection optical system enlarges an image formed on a display device surface, and obliquely projects the enlarged image on a screen surface. The oblique projection optical system has, in the order from a reduction side: a refraction optical portion having a positive optical power, a concave reflection surface having a positive optical power, and a convex reflection surface having a negative optical power. The refraction optical portion includes a rotationally symmetric coaxial refraction group. An intermediate image of the image formed on the display device surface is formed between the refraction optical portion and the concave reflection surface. An aperture stop image is formed between the concave reflection surface and the convex reflection surface. The concave reflection surface and the convex reflection surface fulfill prescribed conditional formulae.

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Sakai, Japan

Keiko Yamada