Fluorescence detecting apparatus

• US 20060226375A1
• Filed: 04/05/2006
• Published: 10/12/2006
• Est. Priority Date: 04/06/2005
• Status: Active Grant

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Inventors: Maruo, Yuji
• Granted Patent: US 7,307,261 B2
• Time in Patent Office: Days
• US Class Current: 250/458.100
• CPC Class Codes: G01N 2021/6463 Optics
• CPC Class Codes: G01N 21/645 Specially adapted constructive features of fluorimeters
• CPC Class Codes: G01N 21/6452 Individual samples arranged in a regular 2D-array, e.g. multiwell plates
• CPC Class Codes: G01N 21/6458 Fluorescence microscopy fluorescence microscopes per se G02B21/0076 and G02B21/16

Abstract

A fluorescence detecting apparatus includes: a light source for illuminating the surface of detection of a sample with excitation light; a CCD area image sensor for detecting fluorescence emitted from the sample; and a micromirror array device for irradiating excitation light in a 2-dimensional illumination pattern generated by an information processor based on the detected result from the CCD area image sensor. In this configuration, irradiation of weak excitation light on areas that contain large amounts of fluorescent dyes hence would emit strong fluorescence makes it possible to excite reduced amounts of fluorescence and thereby inhibit adverse effects such as blurring or spreading of light of fluorescent wavelengths around the areas as well as to prevent the high-sensitivity fluorescence detecting device from being saturated by excessive amounts of light. On the other hand, irradiation of strong excitation light on areas that contain lower amounts of fluorescent dyes hence would emit weak fluorescence makes it possible to obtain high enough amounts of fluorescence that can be detected by the fluorescence detecting device.

Claims

1. A fluorescence detecting apparatus comprising:

a light source device for illuminating a sample with excitation light;

a fluorescence detecting device for detecting fluorescence emitted from the sample; and

an excitation light pattern generating device for generating an illumination pattern of excitation light to be irradiated over the surface under observation of the sample, in accordance with the detected result from fluorescence detecting device.

2. The fluorescence detecting apparatus according to claim 1, wherein the excitation light pattern generating device comprises a micromirror array device.

3. The fluorescence detecting apparatus according to claim 1, wherein the excitation light pattern generating device comprises a reflection-type liquid crystal device.

4. The fluorescence detecting apparatus according to claim 1, wherein the excitation light pattern generating device comprises a transmission-type liquid crystal device.

5. The fluorescence detecting apparatus according to claim 1, wherein the fluorescence detecting device comprises a CCD area image sensor.

6. The fluorescence detecting apparatus according to claim 5, wherein the fluorescence detecting device comprises an electronic cooling device.

7. The fluorescence detecting apparatus according to claim 1, wherein the excitation light pattern generating device is arranged so that the minimum unit area of the excitation light pattern generating device which receives excitation light irradiated from the light source device and generates a pattern of the excitation light and the unit detection area of the fluorescence detecting device are approximately equal in size and position to each other on the sample surface from which fluorescence is emitted.

8. The fluorescence detecting apparatus according to claim 5, wherein the excitation light pattern generating device is arranged so that the minimum unit area of the excitation light pattern generating device which receives excitation light irradiated from the light source device and generates a pattern of the excitation light and the unit detection area of the fluorescence detecting device are approximately equal in size and position to each other on the sample surface from which fluorescence is emitted.

9. The fluorescence detecting apparatus according to claim 6, wherein the excitation light pattern generating device is arranged so that the minimum unit area of the excitation light pattern generating device which receives excitation light irradiated from the light source device and generates a pattern of the excitation light and the unit detection area of the fluorescence detecting device are approximately equal in size and position to each other on the sample surface from which fluorescence is emitted.