Abstract:
An optical well is configured to receive a test sample for examining an optical characteristic of the sample at a first wavelength in a predetermined wavelength range. The optical well includes a wall having a bottom wall portion and a sidewall portion defining a chamber for receiving the test sample, and an optical film formed into a shape so that a portion of the sidewall portion includes a first portion of the optical film, and a portion of the bottom wall portion includes a second portion of the optical film. For a normally incident light, the microlayers in each of the first and second portions have an average optical reflectance of greater than about 80% in the predetermined wavelength range. The forming results in the plurality of microlayers of the integral formed optical film having a thinnest portion and a thickest portion having a thickness difference of at least 30%.
Abstract:
A device for the photometric examination of samples has a sample-holder apparatus for at least two sample vessels, and a measuring apparatus and a moveable apparatus. The sample-holder apparatus is designed to be stationary, and the measuring apparatus is arranged on the moveable apparatus such that it can be displaced by means of the moveable apparatus.
Abstract:
The present invention relates generally to the field of biochemical laboratory instrumentation for different applications of measuring properties of samples on e.g. microtitration plates and corresponding sample supports. The object of the invention is achieved by providing an optical measurement instrumentation wherein a sample (281-285) is activated (212AS, 218AS) and the emission is detected (291, 292), wherein between the activation and detection phases of measuring the sample, a shift is made in the relative position between the sample and means (218) directing the activation radiation to the sample as well as in the relative position between the sample and the means (293) receiving the emission radiation from the sample. This can be implemented e.g. by moving (299) the sample assay plate and/or a measuring head between the activation and emission phases of a sample. The invention allows a simultaneous activation of a first sample and detecting emission from a second sample thus enhancing efficiency of the measurement.
Abstract:
A spectrophotometric optical system of a microplate reader and a filter wheel thereof are disclosed. The filter wheel comprises a pivotable wheel body, at least one narrow-band filter with a relatively long central wavelength mounted to the wheel body, and at least one narrow-band filter with a relatively short central wavelength mounted to the wheel body. The narrow-band filter with a relatively long central wavelength is provided with a diaphragm on a front surface thereof The diaphragm is formed with a plurality of apertures. A ratio of a total effective area of the plurality of apertures to an effective area of the narrow-band filter with a relatively short central wavelength is equivalent to a ratio of energy amounts of shorter wavelength light passed through the narrow-band filter with a relatively short central wavelength to energy amounts of longer wavelength light passed through the narrow-band filter with a relatively long central wavelength when the diaphragm is not disposed. By the diaphragm attached to the front surface of the narrow-band filter with a relatively long central wavelength, an energy matching between light of longer wavelength and light of shorter wavelength may be achieved. Further, due to the uniformly distributed apertures in the diaphragm, an even light spot may be obtained.
Abstract:
The present invention relates generally to the field of biochemical laboratory instrumentation for different applications of measuring properties of samples on microtitration plates and corresponding sample supports. An optical measurement instrumentation is provided, a sample is activated and the emission is detected, wherein between the activation and detection phases of measuring the sample, a shift is made in the relative position between the sample and elements directing the activation radiation to the sample as well as in the relative position between the sample and the elements receiving the emission radiation from the sample. This can be implemented e.g. by moving the sample assay plate and/or a measuring head between the activation and emission phases of a sample. The invention allows a simultaneous activation of a first sample and detecting emission from a second sample thus enhancing efficiency of the measurement.
Abstract:
Light emitting diodes (LEDs) are mounted in an array to an upper structure overlying a lower structure with a plurality of light detectors thereon. Each LED is configured to overlie a separate detector. Each LED emits light at a frequency relevant for measuring optical density of a specimen. LEDs having different frequencies are included within the LED array. A corresponding array of detectors is also provided, mounted to the lower structure. Spacing between adjacent LEDs and between adjacent detectors match a spacing between wells in a microtiter plate. Spacing between the lower structure and the upper structure supporting the LEDs is sufficient for the microtiter plate to fit between. Circuitry sequentially fires individual LEDs and gathers optical density data through the detectors for specimens in the wells of the microtiter plate. The structures are then moved to a next adjacent well position on the microtiter plate and the process repeated.
Abstract:
Using an LED element as a light source, a photometric unit including the light source, a light receiving element and other components therebetween is reduced in size. A holder 30 detachable from the device as a unit holds a light emission unit 15 formed of an LED and a light receiving element 21, and the holder is placed inside a thermostatic chamber 18 which holds a constant temperature fluid 17. Thus, the photometric unit is reduced in size.
Abstract:
A light amount is increased and an analyzing accuracy can be kept in accordance with an enlargement of a load angle, however, a scattered light tends to be loaded in an analysis accompanying the scattered light and a dynamic range of a concentration which can be measured becomes narrow. A light is dispersed by a light dispersing portion, a load angle of the received light is changed per wavelength, the load angle is made larger in the light of a wavelength having a small light amount, and the load angle is made smaller in the light a wavelength having a large light amount and used for an analysis accompanying a scattered light. Accordingly, it is possible to gain a dynamic range of a concentration which can be measured in the analysis accompanying the scattered light, while increasing the light amount and maintaining the analyzing accuracy.
Abstract:
This invention provides a multiphoton excitaion microscope for simultaneously detecting differently colored fluorescence materials on biochips, which includes a multiphoton excitation source, objectives, and a plurality of detection channels. The biochip is hybridized and labeled with fluorescence materials for expressing hybridized biological signals. The multiphoton excitation source is focused to a light spot on the biochip to excite the fluorescence materials bound thereon. After that, the fluorescence emission at different wavelengths from the different fluorescent materials can be detected by the plural detection channels.
Abstract:
An optical detection apparatus which is capable of measuring a sample is provided. The optical detection apparatus includes a plurality of light emission units, a light receiving unit, a driving unit, and an analyzing unit. Each of the light emission units is capable of emitting a light beam. The light receiving unit is capable of receiving the light beam passing through the sample and is capable of converting the received light beam to an electrical signal. The driving unit is capable of changing the relative position of the light emission units and the sample. The analyzing unit is electrically connected to the light receiving unit and is capable of measuring a property of the sample by using the electrical signal. A number of the light receiving unit is less than a number of the light emission units. An optical measurement system including the optical detection apparatus is also provided.