摘要:
Disclosed is a near field light generating device comprising a first medium layer which transmits light from a light source. This near field light generating device generates near field light by using light irradiating a plasmon probe through the first medium. This near field light generating device is characterized in that a second medium layer having a refractive index lower than that of the first medium layer is formed between the first medium layer and the plasmon probe.
摘要:
A laser projection apparatus includes: laser devices; incident optical systems, each of which is supplied with light beam from the laser device; a scanning device for two-dimensionally scanning the light beam; and a projection optical system for projecting the light beam from the scanning device onto a screen; wherein the scanning device includes a resonant drive mirror for performing deflection in a main scanning direction, and the projection optical system includes at least two nonaxisymmetric-shaped reflecting mirrors and a light source image is present between the first mirror, which is most closest to the scanning device, and the second mirror, thereby achieving a laser projection apparatus using a projection optical system which is easy to downsize, has velocity uniformity and has successful projection characteristics and brightness.
摘要:
A laser projection apparatus PJ includes: laser devices; incident optical systems, each of which is supplied with light beam from the laser device; a scanning device for two-dimensionally scanning the light beam; and a projection optical system for projecting the light beam from the scanning device onto a screen; wherein the scanning device includes a resonant drive mirror for performing deflection in a main scanning direction, and at least one light source image is formed in an optical path ranging from the scanning device to the screen SC, and the projection optical system includes two reflecting mirrors which has such a power that, with respect to the main scanning direction, a positive power thereof becomes increasingly greater toward peripheries of the main scanning direction, and each of the incident optical systems has a power in the main scanning direction and a power in the sub scanning direction, one power being different from another power, thereby achieving a laser projection apparatus using a projection optical system which is easy to downsize, has velocity uniformity and has successful projection characteristics and brightness.
摘要:
A reflecting prism (PR1) and a reflecting prism (PR2) each adapted to bend an incident ray at a predetermined angle for reflection are arranged in such a manner that an incident surface of the reflecting prism disposed on a side of a subject on an optical path and the exit surface of the other reflecting prism are aligned substantially parallel to each other. The incident surface or the exit surface of at least one of the reflecting prisms has an optical power. At least one lens group including one or more lens element is arranged between the two reflecting prisms in such a manner that the optical axis of the lens group is coincident with the axis of the optical path between the two reflecting prisms. At least one lens group is moved in the direction of the optical axis thereof. Thus, provided are a thin and superfine zoom optical system, an imaging lens device incorporated with the zoom optical system, and a digital apparatus loaded with the imaging lens device.
摘要:
A motorcycle, having both left and right mufflers, has an exhaust structure which enables an increase in the allowable margin through which the rear wheel is permitted to rise. A main exhaust pipe extends from an engine to one side of a shock absorber disposed on the rear side of the engine. The main exhaust pipe is branched in the vicinity of the shock absorber into a first branch pipe and a second branch pipe. The first branch pipe is connected to a first muffler disposed on the same side as the main exhaust pipe, and the second branch pipe is connected to a second muffler after passing between the shock absorber and a rear wheel to the opposed side of the vehicle body. The second branch pipe does not interfere with the rising motion of the rear wheel, and a sufficient allowable margin is secured for the rear wheel.
摘要:
In a light emitting module arranging therein a plurality of LEDs, each LED includes: an LED chip; and an anode connected to the LED chip. The anode includes: a support surface supporting the LED chip; and an extending part extending with respect to the support surface, and the extending parts in the plurality of LEDs separate from each other.
摘要:
An image-taking lens apparatus has an image sensor for converting an optical image of a subject into an electrical signal and an image-taking lens system for forming the optical image on the image sensor. The image-taking lens system includes a prism for bending the optical path, and the refractive index of the prism fulfills a prescribed conditional formula.
摘要:
An optical element that condenses light emitted from a light source has: an entrance surface where the light enters; an exit surface from which the light entering inside via the entrance surface; and a reflection surface that directs, to the exit surface by total reflection, part of the light entering the inside via the entrance surface. The reflection surface has an axis of symmetry of sixfold or higher-order-fold rotation. The optical element fulfills conditional formula: 0.3
摘要:
The present invention provides image pickup optical systems capable of suppressing the degradation of the image quality due to unnecessary light beams while attaining compaction by optimizing the shapes of the emission surfaces of reflection prisms. The image pickup optical system includes an incidence-side prism for reflecting incident light while folding it by about 90 degree and an image-surface side prism. An image pickup device is placed near the emission surface of the image-surface side prism. The incidence-side prism is formed to have a convex emission surface. This can reduce the amount of the unnecessary light beams (stray light) reflected by the aforementioned reflection surface and also causes the unnecessary light beams reflected by the emission surface and the reflection surface to be diffused, thereby significantly reducing the amount of unnecessary light beams directed to the light receiving surface of the image pickup device. This can suppress the occurrence of ghosts and the like due to unnecessary light beams as aforementioned.
摘要:
A taking lens apparatus has a zoom lens system that is composed of a plurality of lens units and that achieves zooming by varying the distances between the lens units and an image sensor that converts the optical image formed by the zoom lens system into an electrical signal. The zoom lens system has a first lens unit that is disposed at the object-side end of the zoom lens system, that has a negative optical power as a whole, that includes a reflective member for bending the optical axis of the zoom lens system as a whole at substantially 90°, and that remains stationary relative to the image sensor during the zooming of the zoom lens system, a second lens unit that is disposed on the image-sensor side of the first lens unit with a variable aerial distance secured in between, that has a positive optical power as a whole, and that moves toward the object side during the zooming of the zoom lens system from the wide-angle end to the telephoto end, and a third lens unit that is disposed on the image-sensor side of the second lens unit with a variable aerial distance secured in between, that has a positive optical power as a whole, and that moves toward the object side during the zooming of the zoom lens system.