Kurashiki Boseki Kabushiki Kaisha

Akifumi Ikehata

Noboru Higashi

Yukihiro Ozaki

Naomi Kariyama

In far ultraviolet spectroscopy using attenuated total reflection, total reflection light is measured by using evanescent waves of total reflection light. The penetration depth thereof is equal to or larger than 150 nm in a wavelength range in the far ultraviolet range wherein the penetration depth depends on a wavelength of the far ultraviolet light, refractive index of an object to be measured, refractive index of optical material of the probe and incident angle of the far ultraviolet light at an interface between the probe and the object. The attenuated total reflection probe is made of an optical material selected so as to have the penetration depth equal to or higher than 150 nm in far ultraviolet wavelength range, and the probe makes contact with the object to be measured at the interface, and the far ultraviolet light is incident on the interface at incident angle larger than critical angle in the wavelength range so as to have the penetration depth equal to or higher than 150 nm. The total reflection light from the interface is measured, and absorbance of the object to be measured is determined.

Method for attenuated total reflection far ultraviolet spectroscopy and an apparatus for measuring concentrations therewith

An optical probe consists of a first component made of a first optical material having a light transmission property in the far ultraviolet region, and a second component made of a second optical material arranged in contact with the surface of the first component. For example, the second optical material has a higher refractive index in the far ultraviolet region than the first optical material. The second component is provided, on a side in contact with a sample, with a surface totally reflecting light having incident angle equal to or larger than the critical angle. Alternatively, an optical probe has an optical material having a light transmission property in the far ultraviolet region, having a surface totally reflecting a ray of light of incident angle equal to or larger than the critical angle, at a side in contact with a sample, and the refractive index is higher near the surface than at the other parts in the far ultraviolet region. Consequently, a spectroscopic measurement becomes possible on very small solute components dissolved into water or the like in the far ultraviolet region.

Attenuated total reflection optical probe and apparatus therewith for spectroscopic measurement of aqueous solution

An attenuated total reflection probe has a prism and a supporter. The prism is made of an optical material which transmits light in far ultraviolet region, and has a contact plane to be in contact with a sample, and an incoming plane and an outgoing plane both not to be in contact with the sample. The supporter has an opening and is connected hermetically with the prism around the opening and eventually exposes the contact plane facing the opening. The contact plane, the incoming plane and the outgoing plane of the prism are formed such that light transmitting the incoming plane enters the contact plane at an incident angle larger than critical angle and that the light totally reflected by the contact plane goes out through the outgoing plane.

Growing community of inventors

Hyogo, Japan

Akifumi Ikehata