WO2002071016A1 - Verfahren zur photonenzählung in laser-scanning-systemen - Google Patents
Verfahren zur photonenzählung in laser-scanning-systemen Download PDFInfo
- Publication number
- WO2002071016A1 WO2002071016A1 PCT/EP2002/002375 EP0202375W WO02071016A1 WO 2002071016 A1 WO2002071016 A1 WO 2002071016A1 EP 0202375 W EP0202375 W EP 0202375W WO 02071016 A1 WO02071016 A1 WO 02071016A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- photons
- time
- laser
- threshold
- photon
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 6
- 238000005259 measurement Methods 0.000 claims abstract description 13
- 238000001514 detection method Methods 0.000 claims abstract description 3
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J11/00—Measuring the characteristics of individual optical pulses or of optical pulse trains
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
Definitions
- the comparator needs a certain (switching time) to get from one state to the other. If the individual photons are so close together that the comparator cannot detect the level changes of the adjacent photons with its switching time, it will only recognize one state and therefore only count one photon.
- Incoming photons are evaluated two-dimensionally by measuring the amplitude in several threshold values and measuring in a time grid, with a counting frequency at least twice the photon time (empirical duration of the required measurement for a photon), pulses of a higher frequency are counted than that by the photon time prescribed.
- Comparators, discriminators, triggers, but also in digital form AD converters and associated registers can be used for the threshold value determination.
- the photon time can be used as the gate time during which an even higher frequency runs into the counter
- the result can be summarized in a counter or in an adder and read out via a register. After each measurement, the register is cleared again by a clear pulse.
- the signal to be measured is present at the inputs of the 4 comparators. If the input signal exceeds the switching threshold S1, the tilts Comparator and 'releases the gate circuit (negator and AND operation) via the first negator N1.
- This formulation F 2lmpulse means that because of the sampling theorem at least two pulses have to be counted per one photon time. The determination of the total number of photons then has a factor of 1/2 in the formula. This results from the definition of at least 2 pulses per photon. If one were to define a 10-fold counting frequency, the factor 1/10 would have to be in the sum formula in order to arrive at the real number of photons. If comparator S2 has reached the threshold, the AND operation of the first comparator is blocked immediately with the output of the comparator and that of the second comparator is opened.
- the later switching of the second comparator is compensated for by the running time of the signal of the first comparator through the first negator N1, so that the second comparator can still safely block the first gate circuit.
- the pulses in counter 2 are multiplied by 2 (2xF), those in counter 3 by 3 (3xF) etc. and thus have a higher value than pulses that enter counter 1 via comparator one. This measures the second dimension, since photons in series only generate a higher amplitude, but can take the same time.
- the switching thresholds S3 and S4 behave in the same way.
- the counting channels underneath are blocked, whereby the further negators N2, N3 .., as with the first negator, provide for corresponding runtime compensation, so that the second or further gate switching can still be blocked.
- the highest threshold has priority.
- the count values Z of the counters i are combined with an adder (summation) and placed as a measured value ZP in a register, for example, and subsequently read and processed by a computer.
- the combination of the amplitude monitoring and the time measurement of the incoming photons give an exact picture of the actual number of photons that occur within a measurement time.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
- Length Measuring Devices By Optical Means (AREA)
- Measurement Of Unknown Time Intervals (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP02722177A EP1287320A1 (de) | 2001-03-07 | 2002-03-05 | Verfahren zur photonenzählung in laser-scanning-systemen |
JP2002569889A JP2004518979A (ja) | 2001-03-07 | 2002-03-05 | レーザ走査式装置において光子を計数するための方法 |
US10/381,090 US20030183754A1 (en) | 2001-03-07 | 2002-03-05 | Method for counting photons in laser-scanning systems |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10110925A DE10110925A1 (de) | 2001-03-07 | 2001-03-07 | Verfahren zur Photonenzählung in Laser-Scanning-Systemen |
DE10110925.3 | 2001-03-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2002071016A1 true WO2002071016A1 (de) | 2002-09-12 |
Family
ID=7676589
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2002/002375 WO2002071016A1 (de) | 2001-03-07 | 2002-03-05 | Verfahren zur photonenzählung in laser-scanning-systemen |
Country Status (5)
Country | Link |
---|---|
US (1) | US20030183754A1 (de) |
EP (1) | EP1287320A1 (de) |
JP (1) | JP2004518979A (de) |
DE (1) | DE10110925A1 (de) |
WO (1) | WO2002071016A1 (de) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10253108B4 (de) * | 2002-11-13 | 2005-11-03 | Leica Microsystems Heidelberg Gmbh | Verfahren zur Detektion eines Objekts mit einem Rastermikroskop und Rastermikroskop zur Detektion eines Objekts |
DE102006030530A1 (de) * | 2006-07-01 | 2008-01-03 | Carl Zeiss Microimaging Gmbh | Verfahren und Anordnung zur Detektierung von Lichtsignalen |
RU2472179C2 (ru) * | 2007-06-19 | 2013-01-10 | Конинклейке Филипс Электроникс Н.В. | Цифровая обработка импульсов в схемах счета мультиспектральных фотонов |
DE102009043746A1 (de) | 2009-09-30 | 2011-03-31 | Carl Zeiss Microimaging Gmbh | Verfahren zum Erzeugen von Bildern mit erweitertem Dynamikumfang und optisches Gerät zur Durchführung eines solchen Verfahrens, insbesondere Laser-Scanning-Mikroskop |
DE102011052334B4 (de) | 2011-08-01 | 2013-04-11 | Leica Microsystems Cms Gmbh | Einrichtung und Verfahren zum Zählen von Photonen |
DE102017007376B4 (de) | 2017-07-20 | 2023-05-25 | Becker & Hickl Gmbh | Verfahren und Anordnung zur Aufzeichnung von optischen Quantenereignissen |
JP2021016069A (ja) * | 2019-07-11 | 2021-02-12 | 日本放送協会 | 固体撮像素子及び撮像装置 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH1137851A (ja) * | 1997-07-22 | 1999-02-12 | Hamamatsu Photonics Kk | 光波形計測装置 |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6137566A (en) * | 1999-02-24 | 2000-10-24 | Eoo, Inc. | Method and apparatus for signal processing in a laser radar receiver |
US6355921B1 (en) * | 1999-05-17 | 2002-03-12 | Agilent Technologies, Inc. | Large dynamic range light detection |
-
2001
- 2001-03-07 DE DE10110925A patent/DE10110925A1/de not_active Withdrawn
-
2002
- 2002-03-05 WO PCT/EP2002/002375 patent/WO2002071016A1/de not_active Application Discontinuation
- 2002-03-05 EP EP02722177A patent/EP1287320A1/de not_active Withdrawn
- 2002-03-05 JP JP2002569889A patent/JP2004518979A/ja active Pending
- 2002-03-05 US US10/381,090 patent/US20030183754A1/en not_active Abandoned
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH1137851A (ja) * | 1997-07-22 | 1999-02-12 | Hamamatsu Photonics Kk | 光波形計測装置 |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 1999, no. 05 31 May 1999 (1999-05-31) * |
Also Published As
Publication number | Publication date |
---|---|
DE10110925A1 (de) | 2002-09-12 |
EP1287320A1 (de) | 2003-03-05 |
US20030183754A1 (en) | 2003-10-02 |
JP2004518979A (ja) | 2004-06-24 |
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