WO1994011770A1 - Arrangement with an image intensifier and an image receiver - Google Patents

Arrangement with an image intensifier and an image receiver Download PDF

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Publication number
WO1994011770A1
WO1994011770A1 PCT/DE1993/001033 DE9301033W WO9411770A1 WO 1994011770 A1 WO1994011770 A1 WO 1994011770A1 DE 9301033 W DE9301033 W DE 9301033W WO 9411770 A1 WO9411770 A1 WO 9411770A1
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WIPO (PCT)
Prior art keywords
image
arrangement
sample
receiver
lens
Prior art date
Application number
PCT/DE1993/001033
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German (de)
French (fr)
Inventor
Gerhard Seitz
Original Assignee
Siemens Aktiengesellschaft
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Publication date
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Publication of WO1994011770A1 publication Critical patent/WO1994011770A1/en

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B21/00—Microscopes

Definitions

  • the invention relates to an arrangement with an image intensifier and an image receiver.
  • an image processing arrangement is proposed which is provided with a video camera system having a recording device and a controller for scanning a sample emitting photons.
  • an optical means e.g. B. a magnifying lens arranged, which serves, among other things, to image the sample in a certain imaging scale on the image intensifier of the recording device.
  • the enlarging lens In order to transmit as high a contrast as possible into the image plane on the image receiver of such a recording device (contrast transmission), the enlarging lens must be dimmed down strongly; H. , a large f-number must be set and it is necessary to add another optical means, e.g. B. to arrange a single lens. A large f-number, however, results in a weakening of the light emitted by the sample onto the image receiver at a given imaging scale.
  • the object of the present invention is to achieve an image of the sample with the least possible attenuation of the light emitted by the sample and good contrast transmission in an arrangement of the type mentioned at the beginning.
  • This object is achieved by an arrangement with an image intensifier which scans a light-emitting sample via a first optical means and the recorded image feeds to an image receiver via a tandem lens arrangement formed from two lenses.
  • the first optical means is likewise a tandem objective arrangement formed from two objectives, in a further embodiment the first optical means is a microscope.
  • a tandem lens arrangement is known from the "X-ray manual" from Rodenstock, issue 3/92 and is intended for the transmission of an X-ray image intensifier output image to a receiver. This lens arrangement consists of a basic lens and a taking lens, which in turn reproduces the output image reproduced infinitely by the basic lens in its focal plane.
  • a first tandem lens arrangement is arranged between the sample and the image intensifier and a second between the image intensifier and the image receiver.
  • the sample is in the focal plane of a first lens of the first lens arrangement and is imaged to infinity.
  • a second lens of this lens arrangement again images this infinitely distant sample image in its focal plane and projects it onto the input screen of the image intensifier.
  • a first lens of the second lens arrangement shows this screen image of the image intensifier infinitely and a second lens of this second lens arrangement projects the image, which is imaged infinitely, onto the image receiver. This significantly improves the contrast transmission.
  • BV denotes an image intensifier which has an electronic means and an input screen and which scans a sample PR via a first tandem lens arrangement T1 formed from two lenses 011, 012.
  • a second second lens arrangement T2 Arranged between the image intensifier BV and an image receiver BE is a second second lens arrangement T2, likewise consisting of two lenses 021, 022.
  • the sample PR is in the focal plane of the objective 011 and is imaged infinitely.
  • the objective 012 reproduces the infinitely distant sample image again in its focal plane.
  • the screen image of the image intensifier BV is imaged infinitely by the objective 021 and again by the objective 022 on the receiver surface of the image receiver BE.
  • the imaging scales of the tandem lens arrangements only depend on the ratio of the focal lengths of the individual lenses and result in:
  • fll ... f22 are the focal lengths of the lenses 011 ... 022.
  • Different sample object field sizes can be selected by exchanging the objective 011 of the tandem objective arrangement T1.
  • An adaptation of different receiver surfaces eg that of a tube or that of CCD sensors
  • the f-number is independent of the imaging scale and results from the focal length of the objective 012 or 022 and the usable pupil diameter of the objective 011 or 021:
  • the entrance pupil diameter is the diameter of the beam entering the lens parallel to the axis.
  • the f-number k1 and k2 result in 1.08 and 0.96.

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  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Microscoopes, Condenser (AREA)

Abstract

The proposal is for an arrangement with an image intensifier (BV) which, via a first optical means (T1), scans a light-emitting sample (PR) and transmits the image obtained to an image receiver (BE) via a tandem objective arrangement (T2) consisting of two object lenses (021, 022). The arrangement of the invention makes it possible to image a sample with the least possible attenuation of the light emitted by the sample and good contrast transmission. The invention is used in image assessment arrangements.

Description

Siemens AktiengesellschaftSiemens Aktiengesellschaft
Anordnung mit einem Bildverstärker und einem BildempfängerArrangement with an image intensifier and an image receiver
Die Erfindung betrifft eine Anordnung mit einem Bild¬ verstärker und einem Bildempfänger.The invention relates to an arrangement with an image intensifier and an image receiver.
In der älteren deutschen Patentanmeldung P 42 21 036.4 ist eine Bildverarbeitungsanordnung vorgeschlagen, die mit einem eine Aufnahmevorrichtung und eine Steuerung aufwei¬ senden Videokamerasystem zum Abtasten einer Photonen aus¬ sendenden Probe versehen ist. Zwischen der Probe und der Aufnahmevorrichtung ist ein optisches Mittel, z. B. ein Vergrößerungsobjektiv, angeordnet, das unter anderem dazu dient, die Probe in einem bestimmten Abbildungsmaßstab auf dem Bildverstärker der Aufnahmevorrichtung abzubilden. Um auf dem Bildempfänger einer solchen Aufnahmevorrichtung einen möglichst hohen Kontrast in die Bildebene zu über- tragen (Kontrastübertragung), muß das Vergrößerungs¬ objektiv stark abgeblendet werden, d. h. , es muß eine große Blendenzahl eingestellt werden und es ist erforder¬ lich, zwischen dem Bildverstärker und dem Bildempfänger ein weiteres optisches Mittel, z. B. ein Einzelobjektiv, anzuordnen. Eine große Blendenzahl bewirkt allerdings bei einem vorgegebenen Abbildungsmaßstab eine Schwächung des von der Probe auf den Bildempfänger ausgesandten Lichtes.In the older German patent application P 42 21 036.4, an image processing arrangement is proposed which is provided with a video camera system having a recording device and a controller for scanning a sample emitting photons. Between the sample and the receiving device there is an optical means, e.g. B. a magnifying lens arranged, which serves, among other things, to image the sample in a certain imaging scale on the image intensifier of the recording device. In order to transmit as high a contrast as possible into the image plane on the image receiver of such a recording device (contrast transmission), the enlarging lens must be dimmed down strongly; H. , a large f-number must be set and it is necessary to add another optical means, e.g. B. to arrange a single lens. A large f-number, however, results in a weakening of the light emitted by the sample onto the image receiver at a given imaging scale.
Der vorliegenden Erfindung liegt die Aufgabe zugrunde, in einer Anordnung der eingangs genannten Art eine Abbildung der Probe mit möglichst geringer Schwächung des von der Probe ausgesandten Lichtes und guter Kontrastübertragung zu erzielen.The object of the present invention is to achieve an image of the sample with the least possible attenuation of the light emitted by the sample and good contrast transmission in an arrangement of the type mentioned at the beginning.
Diese Aufgabe wird gelöst durch eine Anordnung mit einem Bildverstärker, der über ein erstes optisches Mittel eine lichtaussendende Probe abtastet und das aufgenommene Bild über eine aus zwei Objektiven gebildete Tandem-Objektiv¬ anordnung einem Bildempfänger zuführt.This object is achieved by an arrangement with an image intensifier which scans a light-emitting sample via a first optical means and the recorded image feeds to an image receiver via a tandem lens arrangement formed from two lenses.
In einer Ausgestaltung der Erfindung ist das erste opti- sehe Mittel ebenfalls eine aus zwei Objektiven gebildete Tandem-Objektivanordnung, in einer weiteren Ausgestaltung ist das erste optische Mittel ein Mikroskop. Eine Tandem-Objektivanordnung ist aus dem "Röntgenhand- buch" der Firma Rodenstock, Ausgabe 3/92 bekannt und ist zur Übertragung eines Röntgenbildverstärkerausgangsbildes auf einen Empfänger vorgesehen. Diese Objektivanordnung besteht aus einem Basisobjektiv und einem Aufnahme¬ objektiv, welches das durch das Basisobjektiv nach unend¬ lich abgebildete Ausgangsbild wiederum in seiner Brenn- ebene abbildet.In one embodiment of the invention, the first optical means is likewise a tandem objective arrangement formed from two objectives, in a further embodiment the first optical means is a microscope. A tandem lens arrangement is known from the "X-ray manual" from Rodenstock, issue 3/92 and is intended for the transmission of an X-ray image intensifier output image to a receiver. This lens arrangement consists of a basic lens and a taking lens, which in turn reproduces the output image reproduced infinitely by the basic lens in its focal plane.
In der erfindungsgemäßen Anordnung ist eine erste Tandem- Objektivanordnung zwischen der Probe und dem Bildverstär¬ ker und eine zweite zwischen dem Bildverstärker und dem Bildempfänger angeordnet. Die Probe steht in der Brenn- ebene eines ersten Objektives der ersten Objektivanordnung und wird nach unendlich abgebildet. Ein zweites Objektiv dieser Objektivanordnung bildet dieses unendlich entfernte Probenbild wiederum in seiner Brennebene ab und projiziert es auf den Eingangsschirm des Bildverstärkers. Entspre- chend bildet ein erstes Objektiv der zweiten Objektiv¬ anordnung dieses Schirmbild des Bildv&rstärkers nach un¬ endlich ab und ein zweites Objektiv dieser zweiten Objek¬ tivanordnung projiziert das nach unendlich abgebildete Bild auf den Bildempfänger. Dadurch wird die Kontrast- Übertragung wesentlich verbessert.In the arrangement according to the invention, a first tandem lens arrangement is arranged between the sample and the image intensifier and a second between the image intensifier and the image receiver. The sample is in the focal plane of a first lens of the first lens arrangement and is imaged to infinity. A second lens of this lens arrangement again images this infinitely distant sample image in its focal plane and projects it onto the input screen of the image intensifier. Correspondingly, a first lens of the second lens arrangement shows this screen image of the image intensifier infinitely and a second lens of this second lens arrangement projects the image, which is imaged infinitely, onto the image receiver. This significantly improves the contrast transmission.
Anhand der Zeichnung, in der ein Ausführungsbeispiel der Erfindung veranschaulicht ist, werden die Erfindung sowie Vorteile näher erläutert.The invention and advantages are explained in more detail with reference to the drawing, in which an exemplary embodiment of the invention is illustrated.
Die Figur zeigt eine schematische Darstellung einer An¬ ordnung mit einer Aufnahmevorrichtung. Mit BV ist ein ein elektronisches Mittel und einen Ein- gaπgsschir aufweisender Bildverstärker bezeichnet, der eine Probe PR über eine erste aus zwei Objektiven 011, 012 gebildete Tandem-Objektivanordnung Tl abtastet. Zwischen dem Bildverstärker BV und einem Bildempfänger BE ist eine zweite, ebenfalls aus zwei Objektiven 021, 022 bestehende zweite Objektivanordnung T2 angeordnet. Die Probe PR steht in der Brennebene des Objektives 011 und wird nach unend¬ lich abgebildet. Das Objektiv 012 bildet das unendlich entfernte Probenbild wiederum in seiner Brennebene ab. Entsprechend wird das Schirmbild des Bildverstärkers BV durch das Objektiv 021 nach unendlich und durch das Ob¬ jektiv 022 wiederum auf der Empfängerfläche des Bild¬ empfängers BE abgebildet. Die Abbildungsmaßstäbe der Tandem-Objektivanordnungen hängen nur vom Verhältnis der Brennweiten der Einzelobjektive ab und ergeben sich zu:The figure shows a schematic representation of an arrangement with a receiving device. BV denotes an image intensifier which has an electronic means and an input screen and which scans a sample PR via a first tandem lens arrangement T1 formed from two lenses 011, 012. Arranged between the image intensifier BV and an image receiver BE is a second second lens arrangement T2, likewise consisting of two lenses 021, 022. The sample PR is in the focal plane of the objective 011 and is imaged infinitely. The objective 012 reproduces the infinitely distant sample image again in its focal plane. Accordingly, the screen image of the image intensifier BV is imaged infinitely by the objective 021 and again by the objective 022 on the receiver surface of the image receiver BE. The imaging scales of the tandem lens arrangements only depend on the ratio of the focal lengths of the individual lenses and result in:
Figure imgf000005_0001
Figure imgf000005_0001
undand
Figure imgf000005_0002
Figure imgf000005_0002
wobei fll ... f22 die Brennweiten der Objektive 011 ... 022 sind. Durch Austausch des Objektives 011 der Tandem- Objektivanordnung Tl können verschiedene Probenobjekt¬ feldgrößen ausgewählt werden. Eine Anpassung unterschied¬ licher Empfängerflächen (z. B. der einer Röhre oder der von CCD-Sensoren) kann einfach dadurch bewirkt werden, daß ein entsprechendes Objektiv 022 eingesetzt wird. Diewhere fll ... f22 are the focal lengths of the lenses 011 ... 022. Different sample object field sizes can be selected by exchanging the objective 011 of the tandem objective arrangement T1. An adaptation of different receiver surfaces (eg that of a tube or that of CCD sensors) can be effected simply by using a corresponding objective 022. The
Blendenzahl ist unabhängig vom Abbildungsmaßstab und er¬ gibt sich aus der Brennweite des Objektives 012 bzw. 022 und dem nutzbaren Pupillendurchmesser des Objektives 011 bzw. 021 zu:The f-number is independent of the imaging scale and results from the focal length of the objective 012 or 022 and the usable pupil diameter of the objective 011 or 021:
kl = fl2kl = fl2
DEP11 bzw. D EP11 respectively.
k2 = ^f22k2 = ^ f22
Dr ,D r ,
ΕP21 wobei fl2, f22 wiederum die Brennweiten und n Ep,,, U FP21 die Durchmesser der Eintrittspupillen sind und die Be¬ dingungΕP21 where fl2, f22 are again the focal lengths and n E p ,,, U FP 21 are the diameters of the entrance pupils and the condition
DEP11 - DEP12' DEP21 - DEP22 D EP11 - D EP12 ' D EP21 - D EP22
erfüllt werden muß. Der Eintrittspupillendurchmesser ist der Durchmesser des achsparallel in ein Objektiv eintre¬ tenden Strahlenbündels. In einer praktischen Ausführungs¬ form der Erfindung ergeben sich die Blendenzahlen kl und k2 zu 1,08 und 0,96. must be fulfilled. The entrance pupil diameter is the diameter of the beam entering the lens parallel to the axis. In a practical embodiment of the invention, the f-number k1 and k2 result in 1.08 and 0.96.

Claims

Patentansprüche Claims
1. Anordnung mit einem Bildverstärker (BV), der über ein erstes optisches Mittel (Tl) eine lichtaussendende Probe (PR) abtastet und das aufgenommene Bild über eine aus zwei Objektiven (021, 022) gebildete Tandem-Objektivanordnung (T2) einem Bildempfänger (BE) zuführt.1. Arrangement with an image intensifier (BV) which scans a light-emitting sample (PR) via a first optical means (T1) and the recorded image via a tandem lens arrangement (T2) formed from two lenses (021, 022) to an image receiver ( BE) feeds.
2. Anordnung nach Anspruch 1, d a d u r c h g e - k e n n z e i c h n e t ,2. Arrangement according to claim 1, d a d u r c h g e - k e n n z e i c h n e t,
- daß das erste optische Mittel (Tl) eine aus zwei Objek¬ tiven (011, 012) gebildete Tandem-Objektivanordnung (Tl) ist.- That the first optical means (Tl) is a tandem lens arrangement (Tl) formed from two lenses (011, 012).
3. Anordnung nach Anspruch 1, d a d u r c h g e ¬ k e n n z e i c h n e t ,3. Arrangement according to claim 1, d a d u r c h g e ¬ k e n n z e i c h n e t,
- daß das erste optische Mittel (Tl) ein Mikroskop ist. - That the first optical means (Tl) is a microscope.
PCT/DE1993/001033 1992-11-06 1993-10-28 Arrangement with an image intensifier and an image receiver WO1994011770A1 (en)

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DE9215160U DE9215160U1 (en) 1992-11-06 1992-11-06 Arrangement with an image intensifier and an image receiver
DEG9215160.4U 1992-11-06

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* Cited by examiner, † Cited by third party
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DE19605884A1 (en) * 1996-02-19 1997-08-21 Velzel Christiaan H F Interference microscope method for microscopic examination of object with extremely high resolution beyond diffraction boundary

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2729832A1 (en) * 1977-07-01 1979-01-04 Rodenstock Optik G Vignetting-free picture transmission system - has two lens transmitting picture from picture tube e.g. X=ray tube to electronic camera tube e.g. TV camera
FR2418476A1 (en) * 1978-02-24 1979-09-21 Rodenstock Optik G OPTICAL DEVICE FOR GOGGLES FOR NIGHT VISION
EP0029005A2 (en) * 1979-11-09 1981-05-20 KERN & CO. AG Werke für Präzisionsmechanik Optik und Elektronik Optical system for a night vision apparatus with an image intensifier or image converter
EP0033946A2 (en) * 1980-02-07 1981-08-19 Aktiebolaget Bofors Binocular night telescope
DE3248646A1 (en) * 1982-01-08 1983-07-21 Tokyo Shibaura Denki K.K., Kawasaki, Kanagawa DIAGNOSTIC X-RAY DEVICE
EP0396795A1 (en) * 1989-05-10 1990-11-14 Siemens Aktiengesellschaft X-ray diagnostic apparatus
US4977323A (en) * 1973-08-16 1990-12-11 The United States Of America As Represented By The Secretary Of The Navy 360 degree infrared surveillance with panoramic display

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4977323A (en) * 1973-08-16 1990-12-11 The United States Of America As Represented By The Secretary Of The Navy 360 degree infrared surveillance with panoramic display
DE2729832A1 (en) * 1977-07-01 1979-01-04 Rodenstock Optik G Vignetting-free picture transmission system - has two lens transmitting picture from picture tube e.g. X=ray tube to electronic camera tube e.g. TV camera
FR2418476A1 (en) * 1978-02-24 1979-09-21 Rodenstock Optik G OPTICAL DEVICE FOR GOGGLES FOR NIGHT VISION
EP0029005A2 (en) * 1979-11-09 1981-05-20 KERN & CO. AG Werke für Präzisionsmechanik Optik und Elektronik Optical system for a night vision apparatus with an image intensifier or image converter
EP0033946A2 (en) * 1980-02-07 1981-08-19 Aktiebolaget Bofors Binocular night telescope
DE3248646A1 (en) * 1982-01-08 1983-07-21 Tokyo Shibaura Denki K.K., Kawasaki, Kanagawa DIAGNOSTIC X-RAY DEVICE
EP0396795A1 (en) * 1989-05-10 1990-11-14 Siemens Aktiengesellschaft X-ray diagnostic apparatus

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