Abstract:
Wide-field fluorescent imaging on a mobile device having a camera is accomplished with a compact, light-weight and inexpensive optical components that are mechanically secured to the mobile device in a removable housing. Battery powered light-emitting diodes (LEDs) contained in the housing pump the sample of interest from the side using butt-coupling, where the pump light is guided within the microfluidic flow cell to uniformly excite the specimen. The fluorescent emission from the sample is then imaged using an additional lens that is positioned adjacent to the existing lens of the mobile device. A color filter is sufficient to create the dark-field background required for fluorescent imaging, without the need for expensive thin-film interference filters.
Abstract:
An optical fluid tester device for testing a fluid sample in an ampoule includes an ampoule cradle, a radiation source, a radiation detector and an analyzer. The ampoule cradle supports the ampoule. The ampoule with the fluid sample serves as a lens whose focal properties are dependent on the index of refraction of the fluid sample. The radiation source irradiates the ampoule. The radiation detector is located opposite the radiation source so that the ampoule, when supported by the ampoule cradle, lies between the radiation source and the radiation detector. The detector serves to detect the intensity of the incident radiation. The analyzer verifies the composition of the fluid sample based on the detected intensity, which is dependent on the focal properties of the ampoule and is, therefore, indicative of the composition of the fluid sample.
Abstract:
A portable, battery powered instrument for measuring the amount of material dissolved in a liquid solution employs electro-optic technology based on the Beer-Lambert Law. A sample probe (14) is inserted in a solution to be measured. The results of the measurement are displayed on a display (22). The displayed results are frozen for a predetermined period of time at the expiration of which, the power is turned off to conserve battery power.
Abstract:
Appareil de contrôle permettant d'effectuer des tests sur des échantillons qui comprend une chambre d'échantillon dans laquelle on place un récipient contenant une substance luminescente, et une photodiode à avalanche qui enregistre la lumière émise, que mesure ensuite un circuit auquel la photodiode est connectée. Grâce à l'utilisation d'une photodiode à avalanche, l'appareil de contrôle est solide et transportable, de sorte qu'on peut l'intégrer dans un nécessaire portatif pour effectuer sur place des contrôles d'hygiène.
Abstract:
Compositions, devices, methods, and kits are provided for determining the presence of topical compositions on surfaces, such as skin. The present application relates to a device for determining the presence of a composition such a cosmetic comprising a biologically active agent and a fluorescent chromophore on a surface, in particular a skin surface and in which the device comprises a light emitter, light detector, electronic evaluation system to determine the level of fluorescence from the chromophore and a display system all contained in a housing that is hand held. A kit comprising the composition in combination with the device is also claimed.
Abstract:
카메라를 가지는 모바일 장치 상에서의 와이드-필드 형광 이미징이, 분리가능한 하우징 내에서 모바일 장치에 기계적으로 고정되는, 콤팩트하고, 경량이며 저렴한 광학적 성분들로 달성된다. 상기 하우징 내에 포함된 배터리 전력 공급형 발광 다이오드들(LEDs)이 버트-커플링을 이용하여 사이드로부터 관심 대상이 되는 샘플을 펌핑하고, 여기에서 펌프 광이 미세유체 유동 셀 내에서 유도되어 균일하게 시편을 여기시킨다. 이어서, 모바일 장치의 기존 렌즈에 인접하여 배치된 부가적인 렌즈를 이용하여, 샘플로부터의 형광 방출이 이미지화된다. 고가의 얇은-필름 인터페이스 필터들을 필요로 하지 않고도, 컬러 필터가 형광 이미징을 위해서 요구되는 암시야 배경을 충분히 생성할 수 있다.
Abstract:
A system and method for performing UV LED-based absorption detection for capillary liquid chromatography for detecting and quantifying compounds in a liquid, wherein a simplified system eliminates the need for a beam splitter and a reference cell by using a stable UV source, and power requirements are reduced, resulting in a portable and substantially smaller system with relatively low detection limits.
Abstract:
An optical fluid tester device for testing a fluid sample in an ampoule includes an ampoule cradle, a radiation source, a radiation detector and an analyzer. The ampoule cradle supports the ampoule. The ampoule with the fluid sample serves as a lens whose focal properties are dependent on the index of refraction of the fluid sample. The radiation source irradiates the ampoule. The radiation detector is located opposite the radiation source so that the ampoule, when supported by the ampoule cradle, lies between the radiation source and the radiation detector. The detector serves to detect the intensity of the incident radiation. The analyzer verifies the composition of the fluid sample based on the detected intensity, which is dependent on the focal properties of the ampoule and is, therefore, indicative of the composition of the fluid sample.
Abstract:
The present disclosure, among other things, describes a reader system comprising a casing, an optical system, en electromechanical motor system, and one or more digital processors.
Abstract:
An optical analysis system includes a light source configured to radiate a first light along a first ray path; a modulator disposed in the first ray path, the modulator configured to modulate the first light to a desired frequency; a spectral element disposed proximate the modulator, the spectral element configured to filter the first light for a spectral range of interest of a sample; a cavity in communication with the spectral element, the cavity configured to direct the first light in a direction of the sample; a conical mirror configured to convert the first light reflecting from the sample into a second light, the cavity being further configured to direct the second light; a beamsplitter configured to split the second light into a first beam and a second beam; an optical filter mechanism disposed to receive the first beam, the optical filter mechanism configured to optically filter data carried by the first beam into at least one orthogonal component of the first beam; a first detector mechanism in communication with the optical filter mechanism to measure a property of the orthogonal component to measure the data; a second detector mechanism configured to receive the second beam for comparison of the property of the orthogonal component to the second beam; an accelerometer configured to control the data acquisition such that only detector signals during the period of time when the system is in the proper orientation such that the material sample (e.g., aspirin) is in proximity to the interrogation window are used for calculation; a computer having a data acquisition and conversion card, the computer disposed in the system in communication with the first and second detector mechanisms for signal processing; and a battery and charging system disposed in the system in electrical communication with the system to provide stand-alone operation capability.