In a method of measuring moisture in corn, an ear of corn is operatively coupled to a moisture meter and an amount of moisture is determined while the ear of corn is being grown on a corn plant. The moisture meter can use a spectrometry to determine the amount of moisture in the corn. A moisture meter includes a corn interface configured to conformingly engage the ear of corn when pressed against the ear of corn to form an optical seal about an opening through which the spectrometer determines the amount of moisture in the corn to inhibit ambient light from passing between the corn interface and the ear of corn into the at least one opening.

A laser analysis device includes a laser analysis unit that a sample is irradiated with laser light, a cover that covers a periphery of the laser analysis unit, so as to prevent the laser light from being emitted to outside, and has a slit in at least a part of the cover, a fastener configured to open and close the slit, and an interlock mechanism including a key provided on the fastener and a detector that detects a state in which the fastener is fully closed, in which in a state where the detector has detected that the fastener is fully closed, laser light having a predetermined intensity or more is introduced into the laser analysis unit.

A light avoidance structure (100) for detecting an optical signal, comprising: a base (10), a rotating body (20) pivotally connected to the base (10), and a cover plate (30) arranged facing toward the rotating body (20). The rotating body (20) is provided with a first light shielding member (21); the rotating body (20) is provided with at least one cup hole (22); the cup hole (22) is provided with a detection port (221); the cover plate (30) is provided with a second light shielding member (31); the second light shielding member (31) and the first light shielding member (21) match each other so as to form an annular structure used for shielding light, and a gap (311) is provided at the connection of the second light shielding member (31) and the first light shielding member (21); the detection port (221) is located at the outer side of the first light shielding member (21) and the second light shielding member (31); and the cover plate (30) is provided with at least one hole (32). The light avoidance structure (100) for chemiluminescence measurement may effectively solve the problem of light leakage in a dark room by means of the annular structure used for shielding light provided between the cover plate (30) and the rotating body (20), and is a simple structure and reduces the influence on a device.

A light shield is arranged in a light shielding position with respect to a sensor or a blood leakage detector installed in a medical apparatus and monitoring for changes of transmittance in a translucent fluid carried in a tubing connected to the medical apparatus. The light shield has a non-transparent configuration and is configured to prevent environmental light from being incident on a relevant detection active sensor area. Further, a disposable kit for a medical apparatus which is arranged to be mounted to the medical apparatus and to carry pre-installed disposables to be used during a medical treatment comprises a hard-shell subassembly arranged to be positioned in a region of the medical apparatus in the vicinity of a detection active sensor area of a sensor which is sensitive to light and installed in the medical apparatus. At least one light shield element is selected from first to third light shield elements, and the at least one light shield element is mounted to the hard-shell subassembly of the disposable kit in a region where the detection active sensor area is underneath.

In this sample measuring device a lifting mechanism conveys a sample container from a rack to a sample measuring chamber. An inside light-shielding structure is extended over the upper surface of a base frame and the lower surface of a head, and surrounds a shaft. The inside light-shielding structure is configured from a first ring groove and a first ring protrusion. When the head is in a ground state, the upper surface of the base frame and the lower surface of the head are contacted by the action of a spring. At this time, the first ring groove and the first ring protrusion are integrated. An outside light-shielding structure is provided to the periphery of the inside light-shielding structure. A top plate contains a laminate structure which includes a lightshielding sheet and a lightreflecting plate.

In a method of measuring moisture in corn, an ear of corn is operatively coupled to a moisture meter and an amount of moisture is determined while the ear of corn is being grown on a corn plant. The moisture meter can use a spectrometry to determine the amount of moisture in the corn. A moisture meter includes a corn interface configured to conformingly engage the ear of corn when pressed against the ear of corn to form an optical seal about an opening through which the spectrometer determines the amount of moisture in the corn to inhibit ambient light from passing between the corn interface and the ear of corn into the at least one opening.

Apparatuses and methods of optically analyzing fluid within a pipette are described herein. In an embodiment, an optical reader subassembly includes a pipette configured to aspirate and hold a fluid sample within its tip, a housing configured to receive at least the tip of the pipette through a reentrant seal so that the tip of the pipette is located in a light tight manner within an internal area, a light source positioned to be in proximity to the tip of the pipette when the tip of the pipette is received by the housing, the light source configured to project light through the tip of the pipette and onto the fluid sample held within the tip, and an optical sensor configured to take a reading of the fluid sample held within the tip of the pipette without any of the fluid sample being injected from the pipette.

An optical measuring device for measuring light emitted from a sample includes a container cavity for receiving a container in which the sample is enclosed; a light detection unit for detecting light from the sample; a light guide path for guiding the light from the sample to the light detection unit; and a light absorbing unit for absorbing incident light. An end of the light guide path to receive the incident light faces the container cavity, a light exit end of the light guide path faces the light detection unit, and the light absorbing unit covers the perimeter of the light guide path other than the light-receiving-end and the light exit end thereof.

A mobile phone-based system for ELISA (MELISA). The MELISA system can perform all steps of ELISA procedure and output hormone concentration values. The system includes a heater that keeps the temperature required for sample incubation, illumination system for sample image capturing, and a digital camera system. All components are enclosed in a dark box to create optimal light conditions for image capturing. After sample images are captured, they are digitally processed, and hormone concentration values are reported based on colorimetric data from the samples. The system can be used to complete all steps of the assay, including incubation and reading. It is lightweight, can be fabricated at low cost, is portable, and can transfer test results via mobile phone. MELISA can be calibrated for accurate measurements of progesterone and has demonstrated successful measurements with the calibrated system.

An optical detection device includes a base, a cartridge placing portion, a shield cover, a processor, and an optical sensor. The base includes an opening. The cartridge placing portion is located in the base, and is in communication with the opening. The shield cover is configured to open or close the opening. When the optical sensor is actuated, the shield cover closes the opening to prevent external ambient light from entering the opening to affect the optical sensor during sensing.