Patent ID: 8355121

Claim:
Device for measuring at least one diffusion, absorption and refraction of radiation by a sample, comprising: a radiation source, at least one receiving element, an optical imaging element, a protection element, open free space being located between the protection element and the optical imaging element, a refraction radiation source arranged between the radiation source and the optical imaging element, and a refraction receiver wherein the radiation source and the receiving element are arranged on a sensor side of the optical imaging element, open free space being located between the optical imaging element and the radiation source and between the optical imaging element and the receiving element, wherein the protection element is arranged on a sample side of the imaging element and adjacent to the imaging element, wherein the radiation source, the imaging element and the receiving element are collectively arranged so that at least one of directly transmitted and specularly reflected sample radiation are receivable by the receiving element, wherein the refraction radiation source and the refraction receiver are arranged on the sensor side of the imaging element and are arranged relative to the imaging element so that refraction radiation of the sample specularly reflected by a sample side interface of the protection element can essentially be received by the refraction receiver, and the radiation specularly reflected by an imaging element side interface of the protection element is essentially prevented from being received by the refraction receiver, open free space being located between the optical imaging element and the refraction radiation source and between the optical imaging element and the refraction receiver, wherein a distance of the refraction radiation source from the optical axis of the imaging element is greater than a distance of the radiation source from the optical axis of the imaging element wherein a mirror is arranged on the sample side of the imaging element so that radiation emitted from the radiation source passes at least partially through a transparent sample, reflects from the mirror, and strikes the receiving element.