Patent ID: 8531674
Filing Date: 2013-09-10
Classification: G01N,G02B

Abstract:
1. A microscopic total reflection measuring apparatus, comprising: a Cassegrain mirror comprising a Cassegrain primary mirror and a Cassegrain secondary mirror having coincident central axes, a total reflection prism arranged below the Cassegrain secondary mirror, a visible light filter, and a detector, wherein the Cassegrain secondary mirror is configured to reflect an incident light beam that includes both a visible light component and an infrared light component to the Cassegrain primary mirror, wherein the Cassegrain primary mirror is configured to reflect the incident light beam reflected by the Cassegrain secondary mirror through the total reflection prism to an object to be measured, and to reflect a reflected light beam from the object to be measured to the Cassegrain secondary mirror, wherein the visible light filter is arranged on the total reflection prism to remove the visible light component of the reflected light beam in a total reflection area where angles of reflection relative to the coincident central axes are greater than a critical angle but not in a normal reflection area where angles of reflection relative to the coincident central axes are less than the critical angle, and wherein the apparatus is configured to permit visual observation of the visible light component of the reflected light beam that passed through the normal reflection area at the same time as spectra information is being obtained by the detector from the infrared light component of the reflected light beam that passed through the total reflection area.