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Lens and lens manufacturing method

A lens and main body technology, applied in the direction of lens, instrument, optics, etc., can solve problems such as ghosting or spot

Active Publication Date: 2022-05-10
NIDEC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] For example, in a lens unit with a plurality of lenses, there may be problems such as ghosting or flare

Method used

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  • Lens and lens manufacturing method
  • Lens and lens manufacturing method
  • Lens and lens manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0033] [lens]

[0034] Below, refer to figure 1 The lens according to the first embodiment of the present invention will be described. In addition, in all the drawings below, the dimensions, ratios, and the like of each constituent element are appropriately made different in order to make the drawings easier to see.

[0035] figure 1 It is a schematic diagram which shows the lens of this embodiment. As shown in the figure, the lens 1 of this embodiment has a lens main body 10 , a first film 20 , and a second film 30 .

[0036] (lens body)

[0037] The lens main body 10 is a molded body containing a polymer material. Hereinafter, the polymer material constituting the lens body 10 is referred to as a "first polymer material".

[0038] As the first polymer material, any of thermoplastic resins and curable resins can be used. The curable resin may be thermosetting or photocurable.

[0039] As the first polymer material, for example, acrylic resin represented by polymethyl ...

no. 2 Embodiment approach

[0069] [manufacturing method of lens]

[0070] Figure 2A ~ Figure 2C It is a process drawing which shows the manufacturing method of the lens of 2nd Embodiment of this invention. exist Figure 2A ~ Figure 2C in, for manufacturing figure 1 The case of the lens 1 shown will be described.

[0071] First, if Figure 2A As shown, the first film 20A is formed on one surface S1 (the concave surface Sa and the flat surface Sb).

[0072] The first film 20A is obtained by applying a mixture of a precursor of a second polymer material as a curable resin, an inorganic material, and, if necessary, a solvent (dispersant) to form a film, and then making the resulting film The obtained coating film was cured.

[0073] As for the solvent, various solvents can be used as long as the above-mentioned precursor can be dissolved, and a polar solvent can be preferably used. Examples of solvents used in the mixture include acetone, ketone solvents such as MEK (methyl ethyl ketone), MIBK (meth...

no. 3 Embodiment approach

[0086] [lens]

[0087] image 3 It is explanatory drawing of the lens 2 of 3rd Embodiment of this invention. In this embodiment, the same reference numerals are assigned to the same constituent elements as those in the first embodiment, and detailed description thereof will be omitted.

[0088] As shown in the figure, the lens 2 of this embodiment has a lens main body 10 , a first film 20 , and a second film 31 . The first film 20 is provided between the lens body 10 and the second film 31 .

[0089] The second film 31 is the same inorganic film as the second film 30 described above. The second film 31 covers the surface 20y of the first film 20 and the end surface 20x of the first film 20, and also covers a part of the flat surface Sb.

[0090] The lens 2 has grinding marks on the flat surface Sb.

[0091] The lens 2 having the above configuration has the following functions.

[0092] First, also in the lens 2 , the first film 20 buffers the difference in thermal expans...

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PUM

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Abstract

A lens according to one aspect of the present invention has: a lens body containing a first polymer material; a first film disposed on a surface of the lens body and containing a mixture of a second polymer material and an inorganic material; and a second film, This is an inorganic film arranged on the surface of the first film. The lens main body has: a concave surface provided on one surface viewed along the optical axis of the lens main body; and a flat surface provided on one surface and continuous with the concave surface. At least a part of the concave surface is covered with the first film. The flat surface was exposed from the first film and had polishing marks.

Description

technical field [0001] The present invention relates to a lens and a method of manufacturing the lens. Background technique [0002] Generally, various processes are performed on the surface of the lens in order to improve the function of the lens. [0003] For example, in a lens unit having a plurality of lenses, problems such as ghosting and flare may sometimes occur. These disadvantages are known to arise from stray light caused by reflections from the inner surfaces of the lens unit. [0004] In order to suppress such stray light, as a lens constituting a lens unit, a structure in which an antireflection film is formed on a light-transmitting surface of the lens is known. As an antireflection film, a dielectric multilayer film in which a plurality of two types of inorganic dielectric layers having different refractive indices are laminated alternately is known. [0005] In addition, there is known a configuration in which surfaces other than the light-transmitting sur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B3/00G02B5/00
CPCG02B3/00G02B5/00
Inventor 篠木圭一郎土手内隆敏江口阳明中山隆司
Owner NIDEC CORP