Abstract:
In a method and apparatus for measuring a molecular weight distribution of polymers by high speed liquid chromatography analysis, the present invention heats a sample passing through a cell portion (1) to a temperature that does not cause deposition of the sample by use of a temperature controller (8), connects a spectro-detector consisting of a light source (10) and an optical detection portion (11) to the cell portion (1) by optical transmission means (13, 14) such as an optical fiber and measures transmission light through the sample in the absence of temperature influences from the cell portion and/or the sample. Thus, the invention can analyze easily and accurately a sample having a high melting point.
Abstract:
An apparatus for emitting and receiving light comprises an emitter, which consists of a light source (5) and a concave mirror (7), and a receiver which receives light from the emitter and which is connected to an analysing equipment (3). Furthermore, the receiver comprises a concave mirror (9) which is disposed behind the mirror (7) of the emitter and whose diameter is larger than that of the mirror (7) of the emitter and whose focus is located in front of the light source (5). In the focus of the mirror (9) is positioned one end of an optical fibre (19) for transmitting the received light to the analysing equipment (3). Moreover, the apparatus comprises a retro-reflector unit (17) for reflecting the light from the emitter to the receiver, and a movable shielding element (11) which is provided between the light source (5) and the optical fibre (19) and which prevents, in a first position, the light from the light source from reaching the optical fibre directly, and lets through, in a second position, the light from the light source directly to the optical fibre.
Abstract:
The fibre optic interrogation system comprises a plurality of collection fibres. A first end of each collection fibre is arranged to collect radiation from a particular zone and the second, opposite ends of the collection fibres are arranged in a pattern that permits such second ends to be interrogated individually for radiation transmission by the relevant collection fibre. Those collection fibres which have their first ends adjacent to one another have their second ends in non-adjacent positions in the pattern. The system finds application inter alia in diamond sorting.
Abstract:
A spectrophotometer capable of measuring a plurality of dispersed beams selectively with a linear array sensor (7, 18), which consists of a single row of sensor members, by discharging beams selectively from the output terminals of optical fibers (3a-3c, 13a, 13b, 21) by means of beam selecting means (8a-8c, SW1, SW2).
Abstract:
Gasen in Luft, bestehend aus Meßkammer mit Gassensor (GS), Lichtwellenleiter-(LWL-)Verbindungskabel (LK) und Meßgerät (MG). In dem Sensor wird ein Lichtstrahl in zwei Strahlen aufgeteilt, der eine Strahl durch das Gasgemisch, der andere durch ein Referenzgas geführt, und beide Strahlen werden wieder zusammengeführt. Dabei wird ein allein von der Fremdgaskonzentration (Dicht) abhängiges Interferenzgitter gebildet, und dieses wird einem vorgegebenen Phasengitter überlagert. Dabei entsteht ein Moire, dessen Struktur optisch aufgenommen und elektronisch ausgewertet wird. Diese Einrichtung und das Verfahren sollen so umgebildet werden, daß man einen Gasdichtewächter für einen geschlossenen Druckgasbehälter, und diesen mit einer kleineren Meßkammer erhalt. Als Gassensor (GS) sind in der Längsachse der Meßkammer folgende Bauteile angeordnet: Von den Anschlußsteckbuchsen (3) ausgehend sind zwei LWL-Anschlüsse so weit geführt dass sie mit ihren Endflächen (4) im Brennpunkt einer Sammellinse (5) enden. Es folgt die Linse (5), mit Abstand und parallel hierzu eine ebene Glassplatte (6) mit halbdurchlässiger-halbspiegelnder Rückfläche und ebenso eine weitere Glasplatte (7), aber mit spiegelnder Vorderfläche. Die Einrichtung dient vorwiegend als Gasdichtewächter für druckgasisolierte Schaltgeräte.
Abstract:
Le système de détection d'ions dans une solution aqueuse telle qu'un bain de placage électrolytique comprend une source de lumière (18) qui envoie de la lumière ayant une longueur d'ondes sélectionnée au travers d'une série de fibres optiques (20, 24, 26, 32) sur une sonde (14). La sonde est partiellement immergée dans la solution (12) et la lumière arrive au travers de la solution dans l'espace (94) délimité entre les prismes (82, 92). La lumière renvoyée est conduite par des fibres optiques (32, 38) vers le détecteur ou transducteur optoélectronique (44). Une partie de la lumière d'origine est déviée par le séparateur (22) au travers de la fibre (42) pour être conduite vers le transducteur optoélectronique (46) de sorte qu'une comparaison des signaux détermine la quantité de lumière dans la longueur d'onde sélectionnée qui a été absorbée dans la solution en fonction des ions s'y trouvant. L'unité de traitement de signaux (40) est enfermée de préférence dans une zone protégée électromagnétiquement (16) pour éviter que ne se produisent des effets EMI et d'une atmosphère corrosive adverses à proximité de la cuve de placage électrolytique (10).
Abstract:
본 발명은 가스 터빈 엔진의 측정 영역 내에서 연소 파라메터를 측정하기 위한 장치 및 방법에 관한 것으로, 상기 측정 영역은 외부 케이싱과 상기 외측 케이싱 외부에 반사면을 갖는 엔진 부품 사이에 존재하는 것으로 규정된다. 상기 장치는 선택 파장을 갖는 광의 전송빔을 발생시키는 레이저와, 상기 레이저에 광학적으로 결합된 다중 모드 전송 광섬유를 포함한다. 전송 광학장치(transmitting optic)는 상기 측정 영역으로 빔을 전송하기 위한 단중 모드 광 섬유에 광학적으로 결합 된다. 상기 반사면은 람베르트 반사를 제공하도록 구성된다. 수신 광학장치는 람베르트 반사를 수신하도록 위치된다. 다중모드 전송 광섬유 내에서 전파되는 빛의 모달 노이즈(modal noise)유도 신호 레벨의 변화를 평균화하기 위해 다중모드 전송 광섬유와 작동적으로 연결된 수단이 제공된다.