Pentax 2012 Annual Report Download - page 13

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Please find page 13 of the 2012 Pentax annual report below. You can navigate through the pages in the report by either clicking on the pages listed below, or by using the keyword search tool below to find specific information within the annual report.

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HOYA provides glass with the optical properties demanded by the market. The
data on glass composition included in the database amounts to as many as
50,000 pieces. Around 100 of them are used for the lenses that HOYA currently
provides. As an expert in optical lenses, HOYA considers not only the optical
properties but also the ease of processing of its products.
Optical glass
HOYA's optical lenses can be categorized into two basic types: polished glass
lenses (spherical lenses) and molded glass lenses (aspherical lenses). HOYA's
aspherical lenses are formed at high temperatures in metal molds from molten
optical glass.
Because of their sophisticated shapes, aspherical lenses offer excellent
correction for aberrations, making it possible to shorten focal distances and
reduce the number of lens elements. This contributes to higher functionality for
optical devices like digital cameras, as well as to the smaller size and lower
weight of such devices.
HOYA will continue to support the further evolution of optical lenses by taking
advantage of its integrated system of production, from glass materials to
finished lenses, and by developing glass materials that add value to products.
Aspherical molded glass lenses
Co
py
ri
g
ht 2012 © HOY
A
CORPORATION
Optical Glass
Optical Lenses