1. An eye’s optical characteristics measuring system, comprising a target projecting means for projecting a target image on a fundus of an eye under test, a photodetecting means for guiding the target image toward a photoelectric detector, a pupil diameter measuring means, a calculating means for calculating optical characteristics of the eye under test according to distribution of optical intensity obtained based on an image acquired by the photoelectric detector, and an aperture selecting means provided on each of said target projecting means and said photodetecting means, wherein said aperture selecting means is independently driven, and apertures to restrict a projecting luminous flux and a photodetecting luminous flux are selected based on a pupil diameter of the eye under test measured by said pupil diameter measuring means.
2. An eye’s optical characteristics measuring system according to claim 1, wherein said pupil diameter measuring means comprises at least said photoelectric detector and said calculating means, and the pupil diameter of the eye under test is calculated by image processing based on an image of an anterior ocular segment of the eye under test which is acquired by said photoelectric detector.
3. An eye’s optical characteristics measuring system according to claim 1, wherein there is provided an ocular refractive power measuring system to measure refraction degree of the eye under test.
4. An eye’s optical characteristics measuring system according to claim 3, wherein said ocular refractive power measuring system comprises a second photoelectric detector to acquire an image of an anterior ocular segment of the eye under test, said pupil diameter measuring means comprises at least said second photoelectric detector and said calculating means, and the pupil diameter of the eye under test is calculated by image processing based on an image of the anterior ocular segment of the eye under test acquired by said second photoelectric detector.
5. An eye’s optical characteristics measuring system according to claim 2 or 4, wherein an adequate allowable alignment value for an optical axis of the eye under test and a measurement optical axis is set based on the measured pupil diameter of the eye under test, and the apertures are selected based on the pupil diameter of the eye under test and on the allowable alignment value.
6. An eye’s optical characteristics measuring system according to claim 3, wherein the image acquired by said photoelectric detector includes two or more images at a focusing point and at positions forward and backward of the focusing point to match the refraction degree of the eye under test which is measured by said ocular refractive power measuring system, and an image at an optimal focusing position is selected from said two or more of images.
7. An eye’s optical characteristics measuring system according to claim 1, wherein said photoelectric detector comprises an assembly of pixels on a photodetection surface, and a position of each pixel on a photodetection surface and configuration of the image on the photodetection surface can be detected based on a photodetection signal.
8. An eye’s optical characteristics measuring system according to claim 1, wherein said aperture selecting means comprises an aperture diaphragm where two or more apertures with different diameters are formed and a motor for rotating said aperture diaphragm and for selecting one of said apertures.
9. An eye’s optical characteristics measuring system according to claim 5, wherein there is further provided a display unit, a relation between a diameter of a luminous flux restricted by said selected aperture and the pupil diameter of the eye under test is displayed on said display unit, and alignment can be performed by taking said relation between said apertures and the pupil diameter of the eye under test into account.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A method for forming an optical fiber array, the method comprising:
providing a substrate having a first surface and an opposing second surface, the substrate being provided with a plurality of apertures extending through the substrate from the first surface to the second surface;
providing a plurality of fibers, the fibers having fiber ends with a diameter smaller than the smallest diameter of the apertures;
inserting a first fiber in a first corresponding aperture, from the first surface side of the substrate, such that the fiber end is positioned in close proximity of the second surface;
bending the inserted first fiber in a predetermined direction such that the fiber abuts a side wall of the first aperture at a predetermined position;
after the first fiber is bent, inserting a second fiber in a second corresponding aperture, from the first surface side of the substrate, such that the fiber end is positioned in close proximity of the second surface;
bending the inserted second fiber in conformity with a shape of the first fiber, such that the fiber abuts a side wall of the second aperture at a predetermined position; and
bonding the bent fibers together using an adhesive material.
2. The method of claim 1, wherein the plurality of fibers are bent in conformity with a shape of one another, and are stacked on one another, such that the fibers together form a unitary bonded structure, comprising a first end on the substrate and a second end in a remote area, wherein the unitary bounded structure has an elongated cross-section at the first end and at the second end.
3. The method of claim 1, wherein the plurality of fibers are bent in the same direction, and are stacked on one another, such that the fibers together form a unitary bonded structure extending along a curve, wherein the unitary bonded structure has substantially uniform cross-sections on planes transverse to the curve, wherein the cross-sections have an elongated shape.
4. The method of claim 1, further comprising: applying an adhesive material onto the first fiber, prior to completion of bending the second fiber.
5. The method of claim 1, further comprising: fixating the second fiber for enabling curing of an adhesive material, upon positioning the second fiber in contact with the first fiber,
6. The method of claim 1, further comprising:
providing a bending structure at the first surface side of the substrate, wherein bending the fiber in a predetermined direction comprises bending the fiber over the bending structure.
7. The method of claim 6, wherein the bending structure is provided temporarily, and is removed after the plurality of fibers are bent.
8. The method of claim 6, wherein the bending structure is bonded together with the fibers using an adhesive material.
9. The method of claim 6, wherein the plurality of fibers are bent with a predetermined curvature in conformity with a shape of the bending structure.
10. The method of claim 1, further comprising: applying a pre-load force onto a fiber prior to inserting the fiber into an aperture.
11. The method of claim 1, wherein the plurality of fibers are bent in the same direction.
12. The method of claim 1, wherein the bent fibers are stacked in a predefined spatial arrangement.
13. The method of claim 1, wherein the method further comprises securing the fiber ends within the apertures.
14. The method of claim 13, wherein securing the fiber ends is executed after insertion of the plurality of fibers in corresponding apertures in the substrate.
15. The method of claim 13, wherein the fiber ends are secured by using an adhesive, the method further comprising, prior to inserting, applying an adhesive onto the fiber ends.
16. The method of claim 1, wherein the apertures have a cross-sectional shape consisting of a circular portion and an additional portion in the form of a groove, and wherein the fibers are bent in such direction that the predetermined position at which the fibers abut the side wall of the apertures is within the additional portion.
17. The method of claim 1, wherein bonding the bent fibers together comprises:
forming a mold around the plurality of bent fibers;
filling the mold with an adhesive material; and
curing the adhesive material.