Optical element for transmitting ultraviolet light and light source device including same

a technology of ultraviolet light and optical elements, applied in the field of optical elements, can solve the problem of unsatisfactory sapphire wavelength transmission performance of ultraviolet ligh

Inactive Publication Date: 2013-11-07
HON HAI PRECISION IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present disclosure relates to an optical element and a light source device that can transmit ultraviolet light. The optical element is made of a substrate and a film that is coated on the substrate. The film is made of high refractive index layers and low refractive index layers alternately stacked on the substrate. The high refractive index layers have a refractive index of about 2.0 to about 2.15, and the low refractive index layers have a refractive index of about 1.38 to about 1.46. The film is coated on the first surface of the substrate. The technical effect of the invention is to provide an optical element and a light source device that can transmit ultraviolet light with high transmissivity at ultraviolet wavelengths.

Problems solved by technology

However, the transmissivity of the sapphire at ultraviolet wavelengths is unsatisfactory.

Method used

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  • Optical element for transmitting ultraviolet light and light source device including same
  • Optical element for transmitting ultraviolet light and light source device including same
  • Optical element for transmitting ultraviolet light and light source device including same

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Embodiment Construction

[0009]Embodiments of the disclosure will be described with reference to the drawings.

[0010]Referring to FIG. 1, an optical element 100, according to an exemplary embodiment, is configured to transmit ultraviolet light and visible light. The optical element 100 includes a substrate 10 and a film 20 formed on the substrate 10.

[0011]The substrate 10 is plated shaped and is made of sapphire. Sapphire is a gemstone variety of the mineral corundum and has a hexagonal crystal structure. The main chemical component of sapphire is aluminum oxide (Al2O3), and the refractive index of the sapphire is from about 1.762 to about 1.770. A transmissivity of the substrate 10 at ultraviolet wavelengths from about 190 nm to about 280 nm (UVC) is lower than 84%, at ultraviolet wavelengths from about 280 nm to about 315 nm (UVB) is lower than 85%, and at ultraviolet wavelengths from about 315 nm to about 400 nm (UVA) is lower than 86%. The substrate 10 includes a first surface 11 and a second surface 12 ...

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Abstract

An optical element includes a substrate and a film on the substrate. The substrate made of sapphire. The film is configured for increasing transmission of ultraviolet lights. The film is stacked by a plurality of high refractive index layers and a plurality of low refractive index layers alternately stacked on the substrate.

Description

BACKGROUND[0001]1. Technical Field[0002]The present disclosure relates to optical elements, and particularly, to an optical element for transmitting ultraviolet light and a light source device including the optical element.[0003]2. Description of Related Art[0004]Sapphires have excellent hardness and wear-resistance, and are used in optics and machinery. The sapphire can be used as a cover glass to protect an ultraviolet light source as it transmits ultraviolet light. However, the transmissivity of the sapphire at ultraviolet wavelengths is unsatisfactory.[0005]Therefore, it is desirable to provide an optical element and a light source device, which can overcome the limitations described.BRIEF DESCRIPTION OF THE DRAWINGS[0006]FIG. 1 is a cross-sectional schematic view of an optical element in accordance with an exemplary embodiment.[0007]FIG. 2 is a spectrum chart of the optical element of FIG. 1.[0008]FIG. 3 is a cross-sectional schematic view of a light source device using the opt...

Claims

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Application Information

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Patent Type & AuthorityApplications(United States)
IPC IPC(8): G02B5/00G21K5/04
CPCG02B1/113G02B5/208G02B1/115G02B5/283
InventorWEI, CHAO-TSANG
OwnerHON HAI PRECISION IND CO LTD