摘要:
A lens forming method is provided, including: heating a blank mold with a pre-molding cavity until a glass preform in the pre-molding cavity is in a semi-molten state; applying a pressure to the blank mold, so that the glass preform is extruded to form a lens rough blank with a predetermined shape; cooling the blank mold and the lens rough blank, and separating the blank mold by depressurization, to transfer the lens rough blank to a molding cavity of a high-precision aspherical mold; heating the high-precision aspherical mold until the lens rough blank is softened to a semi-molten state; applying a pressure to the high-precision aspherical mold, so that the lens rough blank is extruded to form a lens molded part with an aspherical structure; and cooling the high-precision aspherical mold and the lens molded part, and separating the high-precision aspherical mold by depressurization, to remove the lens molded part.
摘要:
An inclined surface-equipped lens includes a first inclined surface and a second inclined surface inclined relative to a plane perpendicular to an optical axis, and a corner portion formed by the first inclined surface and the second inclined surface being in contact with each other. Each inclined surface makes a predetermined inclination angle with the plane perpendicular to the optical axis, and the corner portion is located out of the optical axis and raised outward.
摘要:
A headlight lens is provided for a vehicle headlight. The headlight lens includes a lens body and a lens edge. The lens body has an operative surface that extends beyond the lens edge.
摘要:
An object of the present invention is to provide a glass lens resistant to serious damage such as a crack during, for example, transport of a quadrangular glass lens such as a lens array formed by pressing molten glass or a compound lens obtained from the lens array. There are provided step portions 10a and 10c each having a reduced thickness on corners of a quadrangular contour, and hence, even when a corner portion is chipped or cracked during, for example, transport of a compound lens 10, it is possible to prevent the enlargement of the crack in the step portions 10a and 10c. Consequently, it is possible to suppress the occurrence of serious damage such as a crack which reaches the vicinity of optical surfaces 11d and 12d.
摘要:
A press molding glass material including: a core portion composed of optical glass; and a surface layer covering the core portion, wherein the surface layer includes an outermost layer contacting with a molding surface of a molding die in press molding and an intermediate layer adjacent to the outermost layer, the outermost layer is a silicon oxide film having a surface free energy measured by a three-solution method of equal to or less than 75 mJ/m2 and having a film thickness of less than 15 nm, and the intermediate layer is a film composed of a film material having a bond-radius difference from a silicon oxide based on a stoichiometric composition of more than 0.10 Å, wherein, in a case in which the bond-radius difference is more than 0.10 Å and equal to or less than 0.40 Å, a film thickness of the intermediate layer is equal to or less than 5 nm.
摘要翻译:一种压制成型玻璃材料,包括:由光学玻璃构成的芯部; 以及覆盖所述芯部的表面层,其中所述表面层包括与压模成型中的成型模具的成型面接触的最外层和与所述最外层相邻的中间层,所述最外层是具有表面的氧化硅膜 通过等于或小于75mJ / m 2并且具有小于15nm的膜厚度的三溶液法测量的自由能,并且中间层是由具有与半导体层的键半径差的膜材料构成的膜 基于大于0.10的化学计量组成的氧化硅,其中,在所述键半径差大于等于或小于等于或等于0.40的情况下,所述中间层的膜厚等于或等于 小于5nm。
摘要:
The invention relates to a headlight lens for a vehicle headlight, particularly for a motor vehicle headlight, wherein the headlight lens comprises a bright-molded lens body made of a transparent material, having a substantially plane optically effective surface and a convexly curved optically effective surface, wherein the headlight lens comprises a lens edge on the outside of the convexly curved optically effective surface, wherein the substantially plane optically effective surface, protrudes over the lends edge, or over part of the lens edge, in a stepped manner in the direction of an optical axis of the headlight lens.
摘要:
A mold for use in production of a glass optical element includes an upper mold and a lower mold on which a molten glass is dropped, the lower mold being provided with a molding surface for press molding the molten glass with the upper mold. A recess for forming a positioning protrusion on the glass optical element is provided at an outer side of the molding surface. An inclined section is provided at an inner circumferential surface of the recess closer to the molding surface. The inclined section is inclined such that, when the molten glass dropped on the molding surface spreads toward the outer side, the molten glass enters the recess while maintaining contact with the inclined section.
摘要:
A method for manufacturing a glass optical element includes the steps of: feeding molten glass onto a lower mold part; and compression-molding the molten glass using an upper mold part and the lower mold part. The upper mold part is provided with a recess for forming a positioning protrusion of the glass optical element. A surface of the recess includes a first region where a protective film against the molten glass is formed, and a second region where the protective film is not formed and the upper mold part is exposed. In the step of compression-molding the molten glass, after the molten glass enters the recess, the molten glass is compression-molded in a state where a part of the molten glass and the second region do not contact each other, to thereby form the positioning protrusion of the glass optical element.
摘要:
In a method of manufacturing a glass molding, a lower mold includes a recess having a bottom portion and a side portion surrounding the bottom portion, and an outer peripheral planar portion surrounding an upper end of the side portion. A crossing angle between the side portion and the outer peripheral planar portion is set at more than or equal to 45 degrees. A dropping volume of the molten glass drop is such that, when dropped onto the lower mold, a volume of the molten glass drop located above the outer peripheral planar portion is 1.5 times to 6.0 times the volume of the molten glass drop filling the recess.
摘要:
A concave lens as an optical component is made of glass containing 20 to 22% of B2O3, 30 to 40% of La2O3, and 19 to 25% of ZnO, expressed as wt %. The concave lens has a thickness t1 in its center portion of 0.5 mm or less, and a ratio (W/t1) of a diameter W with respect to the thickness t1 of 24 or more. The concave lens can be produced suitably by press forming.