A diagnostic analyzer includes a track, a light-blocking member, a motor, and an optical testing device. The track moves a reaction vessel held by the track. The light-blocking member is disposed adjacent to the track. The light-blocking member moves from a first position apart from the track to a second position closer to the track. When the light-blocking member is disposed in the first position a sample contained within the reaction vessel held by the track is exposed to light. When the light-blocking member is disposed in the second position the sample contained within the reaction vessel held by the track is blocked from exposure to the light. The motor moves the light-blocking member between the first and the second positions. The optical testing device is disposed adjacent to the track for optically testing the sample contained within the reaction vessel held by the track when the at least one light-blocking member is disposed in the second position.

Provided is a microscopic Raman device including: a first laser light source that generates a first laser light; a second laser light source that generates a second laser light having a wavelength different from a wavelength of the first laser light; a first optical element; a second optical element; a third optical element; a fourth optical element; and a spectrometer. When the first laser light is reflected by the first optical element and passes through the third optical element to irradiate a sample, a first Raman scattered light is generated from the sample. When the second laser light is sequentially reflected by the second optical element, the fourth optical element, and the third optical element to irradiate the sample, a second Raman scattered light is generated from the sample. The first Raman scattered light passes through the third optical element and the first optical element to enter the spectrometer.

A method for monitoring a plurality of process chambers, the method includes generating an optical beam at a light source. The method further includes dividing the optical beam into a plurality of light beams. The method further includes providing the plurality of light beams to the plurality of process chambers. And the method further includes measuring the plurality of light beams after being reflected within the plurality of process chambers.

The present disclosure, among other things, describes a reader system comprising a casing, an optical system, an electromechanical motor system, and one or more digital processors.

A measuring apparatus includes an illuminator including a light source to emit light onto an object being conveyed in a conveyance direction; a first diffuser plate; a second diffuser plate between the first diffuser plate and the object; a light shield portion between the second diffuser plate and the object; and a light receiver to receive light specularly reflected from the object illuminated by the illuminator. The light shield portion has an opening that includes an optical axis of light emitted from the light source and reaching the second diffuser plate.