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Latest update: 01/11/2021 13:01:45

Ahiko Finetec Co.,Ltd.

High-precision optical glass polishing and thin film processing for quality that is chosen worldwide!

Creating the future with ultra-precision glass polishing and film deposition less than 0.1 mm thick!

We can provide integrated production of a wide range of optical glass components essential for manufacturing optical devices, such as digital cameras and projectors. This is done by making full use of processing technologies such as shape processing, polishing, and vapor deposition according to customer specifications. We have a particularly established reputation for our polishing and vapor deposition processing technologies.
In terms of polishing technology, we are one of the few companies in Japan that can achieve mirror-like surfaces with nanometer-order surface roughness, and process thicknesses of 0.1 mm or more. 

In vapor deposition processing technology, by alternately layering transparent thin films with different refractive indices on the surface of glass, it is possible to transmit or reflect more than 99% of light in a specific wavelength range.

The optical glass components built into the digital cameras and projectors we all casually use in everyday life may include our company's products.

More than Monozukuri craftsmanship alone, we are a company that wants to be a good partner for our customers.

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Sales Pitch

Company overview
[Business contents]
Optical glass and quartz glass parts to be used as parts of electronic devices, etc.

Cutting, precision flat polishing, and vapor deposition of special glass plates for industrial use

(Integrated production of products from material handling to polishing, cutting, and vapor deposition)
[Scope of main business areas]
Precision flat polishing of plates made of optical glass, quartz glass, crystals, and industrial special glass

Vapor deposition for optical glass, quartz glass, crystals, and industrial special glass

Cutting of optical glass, quartz glass, crystals, and industrial special glass

Polishing of polarized sunglasses
[Main items sold]
CCD/CMOS cover glass for video cameras and digital cameras
Infrared cutting filters for video cameras and digital cameras
Glass boards for projectors
Glass boards for semiconductors
Glass boards for vapor deposition
High-quality vacuum vapor deposition (IR/AR) products for optical purposes
High-quality sputter glass products for optical purposes
Crystal boards for optical purposes
Microscopic ball lenses (items with diameter 1 mm or less under development), etc.
[Precision, maximum machinable diameter, maximum weight, etc.]
Optical glass polishing processing (thickness: from 0.15; outer diameter: from 5)
[Production capacity]
500,000 pieces/month
[Order types we can accept]
We handle prototyping, development, high-mix low-volume production, and mass production
[Manufacturing process]
1) Wire saw
Cutting optical glass, quartz, crystal, and other materials with precision wire with low loss and high accuracy.
2) Centering machine
Grinding the periphery of the workpiece to determine the shape, roughness, and external dimensions of the end face.
3) Double-sided polisher (lapping)
This is the process of determining the flatness (flatness and parallelism) of the workpiece using coarse abrasive grains, and involves batch processing (several to dozens of pieces) using a double-sided polisher.
4) Monitoring
The lapping quality is visually inspected.
5) Double-sided polisher (polishing)
The surface roughness of the workpiece is determined using fine abrasive grains.
Achieves surface roughness on the nanometer scale.
Machining is controlled to eliminate surface defects.
6) Automatic precision cleaners
Equipment that removes dirt, dust, and other impurities from polished glass and dries it.
7)-1 Vacuum deposition equipment
It is possible to deposit multilayer films with optical properties such as anti-reflection, infrared cutting, and UV cutting on optical glass with a mirror finish.
Films with various refractive indices can be selected to form multilayer films, so a range of variations in optical properties can be obtained.
To obtain multilayer films with optical properties that do not change over time, an ion-assisted deposition method can be selected.
7)-2 Sputtering equipment
This system is capable of depositing multilayer films with optical properties that do not change over time, such as anti-reflection, infrared cutting, and UV cutting, on mirror-polished optical glass.
The multilayer films are formed mainly using niobium oxide films with a high refractive index and silicon oxide films with a low refractive index.
Compared to vacuum deposition systems, multilayer films can be formed at lower temperatures.
8) Final inspection
Visual inspection is performed in a dark cleanroom (class 1000 or lower) to less than 5 micrometers.

This company is recommended by the following support organizations.

Tohoku Head Office, SMRJ