摘要:
Provided is an optical characteristic measuring probe which can detect the position and the direction of the leading end of the probe without affecting a monitoring image. The bendable optical characteristic measuring probe is provided with a light guide body (71), which transmits light emitted from a light source and irradiates a subject to be measured with light, and a guide tube (70), which holds the light guide body (71) such that the light guide body freely rotates about the axis and is freely displaced in the axis direction. The light guide body (71) guides at least two types of light, i.e., measuring light for measuring the optical characteristics of the subject to be measured, and position determining light for measuring the position of the light guide body. On the side surface of the guide tube (70), a mark (M) having the characteristics of transmitting the measuring light and returning only the position determining light to the light guide body is provided.
摘要:
Provided is an image pickup lens that forms an image on an image pickup element with light from a subject. In the image pickup lens, a lens that is disposed on an image pickup element side is fixed in position, and a focusing lens group having a plurality of lenses including a lens closest to the subject is moved in an optical axis direction, thereby performing focusing.
摘要:
A glass substrate for information recording medium, said glass substrate being composed of an aluminosilicate glass containing 60-75% by mass of SiO2, 5-18% by mass of Al2O3, 3-10% by mass of Li2O, 3-15% by mass of Na2O and 0.5-8% by mass of ZrO2 relative to the entire glass components. The glass substrate for information recording medium contains neither As (arsenic) nor Sb (antimony), while containing at least one substance selected from the group consisting of SO3 (sulfurous acid), F (fluorine), Cl (chlorine), Br (bromine) and I (iodine), as a refining agent. The molar ratio of the total amount of the refining agent to the amount of Al2O3 is within the range of 0.02-0.20.
摘要:
A manufacturing apparatus of the present invention has a pair of dies that form each cylindrical surface, and a plane member that forms side surfaces of an element. The upper die and the lower die has a cylindrical surface which is worked so as to have generatrix which connects intersection points between a non-arc axis and a cylindrical section and between an arc center axis and the cylindrical section. The plane member is pressed against reference surfaces of the upper die and the lower die. In this state, a glass material is put between the upper die and the lower die, and a distance between the upper die and the lower die is decreased. As a result, the cylindrical surfaces of the upper die and the lower die and the plane of the plane member are transferred onto the glass material.
摘要:
Provided is a small-sized five-element image pickup lens which ensures a sufficient lens speed of about F2 and exhibits various aberrations being excellently corrected. The image pickup lens is composed of, in order from the object side, a first lens with a positive refractive power, including a convex surface facing the object side; a second lens with a negative refractive power, including a concave surface facing the image side; a third lens with a positive or negative refractive power; a fourth lens with a positive refractive power, including a convex surface facing the image side; and a fifth lens with a negative refractive power, including a concave surface facing the image side. The image-side surface of the fifth lens has an aspheric shape, and includes an inflection point at a position excluding an intersection point with the optical axis.
摘要:
Disclosed is a wafer lens in which the warpage of a glass substrate included therein can be prevented. Specifically disclosed is a wafer lens comprising a glass substrate, a first resin part composed of a curable resin, and a second resin part composed of a curable resin. In each of the first resin part and the second resin part, two or more lens parts are formed. The volume of the resin of the first resin part after the cutting and the volume of the resin of the second resin part after the cutting satisfy the condition 0.6≦Vwa/Vwb≦2.1, wherein “Vwa” indicates a volume of a resin on an object side and “Vwb” indicates a volume of a resin on an image side.
摘要:
To convert a pixel value obtained from a non-reference photoelectric conversion characteristic into a pixel value obtained from a reference photoelectric conversion characteristic without variation, and to prevent generation of fixed pattern noise in an image. An image sensor 3 is constituted of pixels having photoelectric conversion characteristics, in which a linear characteristic is on the low luminance side with respect to an inflection point, and a logarithmic characteristic is on the high luminance side with respect to the inflection point. A conversion information storage 68 stores, as conversion information, coefficients “c”, “d”, “e”, and “f” of two kinds of linear functions (y=c·log(x)+d, and y=e·log(x)+f), which are approximation equations expressing the logarithmic characteristic of each of the pixels, where y designates a pixel value, and x designates a luminance value of incident light. A linear converter 64 converts a pixel value obtained from the logarithmic characteristic into a pixel value obtained from the linear characteristic by using the approximation equations specified by the coefficients.
摘要:
An injection mold composed of a movable mold and a fixed mold. The movable mold has bases, a heat insulating layer and a surface processed layer, and the fixed mold has a base. A heat insulator is provided on the inner circumferential surface of the base of the movable mold at a part forming a wall of a cavity. The heat insulating layer is in the rear of the surface processed layer, and therefore, the transfer accuracy of a fine configuration of the surface processed layer is improved. Additionally, since the heat insulator is provided adjacent to the fine configuration, heat radiation from resin is inhibited, and the transfer accuracy of the fine configuration is further improved.
摘要:
An image capture lens is equipped with: a diaphragm which is formed on a substrate, adjusts a light quantity, and has a predetermined aperture; an inorganic or organic adhesion layer formed on the substrate such that the diaphragm is exposed; and a resin part which has a lens part made from a curable resin. The resin part is directly joined to the inorganic or organic adhesion layer and diaphragm. The surface of the substrate on which the diaphragm is formed is subjected to a modification treatment so that a water contact angle is within a range of 3° to 30°.
摘要:
Provided are a wide angle optical system having better optical performance, low in cost, and compact in size, an imaging lens device having the wide angle optical system, a monitor camera, and a digital apparatus. The wide angle optical system (1) has, in order from the object side to the image side, a first lens (11) having a negative optical power, a second lens (12) having a negative optical power, a third lens (13) having a positive optical power, an aperture (15), and a fourth lens (14) having a positive optical power. The wide angle optical system satisfies the conditional expression of 3