US 9,006,687 B2Granted

Optical unit, fluorescence detection device, and fluorescence detection method

AssigneeSharp Kabushiki Kaisha

InventorYukio Watanabe

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Abstract

A first lens configured to convert light from the objective lens into parallel light includes a concave lens part having a concave curved face in a center portion of a flat face, and a convex lens part having a convex curved face around a flat face. Further, the first lens includes first and second regions configured to diverge light through the flat face and the concave curved face and a third region configured to collect light through the convex curved face and the concave curved face. When the sample is on a sample table and sealed in a two-dimensional electrophoresis substrate, light totally reflected by a side surface of the objective lens enters the second region. In contrast, when the sample is directly on the sample table, the light enters the third region.

Claims8

Dependent claims

An optical unit comprising:

an objective lens element that collects light from a measuring object;
and
a conversion lens that converts the light collected by the objective lens element into substantially parallel light,
wherein the objective lens element includes a total reflection part that is located in a peripheral portion to collect light by total reflection on a side surface,
wherein the conversion lens includes a plurality of regions on which the light from the total reflection part of the objective lens element is to be incident, the plurality of regions being provided in accordance with a distance between the objective lens element and the measuring object, and
wherein the conversion lens converts light from the objective lens element incident on all portions including the plurality of regions into the parallel light substantially parallel to an optical axis.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/378,674Filed 20 Feb 2013
Priority: JP 2012-06344521 Mar 2012
Published: US 2015/0028226 A129 Jan 2015
Granted: 14 Apr 2015
Term ends: Not estimatedThe source records don’t support an estimate.

Classification17 codes

G01N 21/645
Fluorescence; Phosphorescence: specially adapted constructive features of fluorimeters
G01N 21/6456
Specially adapted constructive features of fluorimeters: spatial resolved fluorescence measurements; Imaging
G01N 21/6486
Fluorescence; Phosphorescence: measuring fluorescence of biological material, e.g. DNA, RNA, cells
G02B 19/0028
Characterised by the optical means employed: refractive and reflective surfaces, e.g. non-imaging catadioptric systems

Family

US 2015/0028226 A1Pre-grant publication · published 29 Jan 2015
US 9,006,687 B2This patent

From the US filing history. Foreign family members aren’t listed.

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