Semi-transparent mirror

Figure 11.14—Optical path between the monochromator exit and the detector for two double beam instruments (rotating mirror model and semi-transparent mirror model). Instruments with rotating mirrors are similar to those used in IR spectrophotometers. However, the light beam from the source goes through the monochromator before it hits the sample. This minimises photolytic reactions that could occur if the sample is exposed to the total radiation from the source. The optics of instruments with two detectors are simpler and only one mirror, semi-transparent and fixed, is necessary to replace the delicate mechanisms of synchronised, rotating mirrors.

Figure 9.16 Optical path from the exit of the monochromator to the detector for two double beam instruments, (a model with two rotating mirrors and a model with a semi-transparent mirror). The arrangement of the apparatus with rotating mirrors is similar to that of IR spectrophotometers apart from the fact that the light beam issuing from the source passes first through the monochromator before it hits the sample. In this way the photolytic reactions which could occur owing to an overexposure to the total radiation issued from the source are minimized. A more compact and simple optical assembly with a single beam associated with two detectors. A semi-transparent and fixed mirror replaces the delicate mechanism of synchronized, rotating mirrors.

Figure 13.13 Scheme of a AA spectrometer showing deuterium lamp background correction. This double beam assembly includes a deuterium lamp whose broad emission is superimposed, using a semi-transparent mirror, upon the spectral lines emitted by the HCL. Beam path a passes through the flame while beam path b is a reference path. The instrument measures the ratio of the intensities transmitted by the two beams and for the two sources. The domain of correction is limited to the spectral range of the deuterium lamp, being 200-350 nm (reproduced from the optical scheme of model Spectra AA-10/20, Varian). 

Another class of reflector coatings are beam splitters, also known as semi-transparent mirrors. These are mirrors which reflect part of the incident light... 

Figure 6-11. Schematic of plasma-chemical microwave system with magnetic field (1) plasma-chemical reactor (2) converter of type of electromagnetic wave (3, 4) solenoids (5) vacuum pump (6) liquid nitrogen trap (7) refrigerator, (8) gas tanks (9) control volumes (10) vacuum-meter (11, 12) differential manometers (13) waveguide branching system (14) spectrograph (15, 16) microwave detectors (17) semi-transparent mirror (18) photo-electronic amplifier (M) magnetron microwave source (K) klystron microwave source (S) window for diagnostics.

Each of the objects has a semi-transparent mirror at its vertex, and ordinary mirrors at the ends. We will be interested in how much time it takes the light to travel along the arms of our objects (back and forth). One of the two arms of any object is oriented along the x axis, while the other one must be orthogonal to it The mirror system enables us to overlap the light beam from the horizontal arm (jc axis) with the light beam from the perpendicular arm. If there were any difference in phase between them we would immediately see the interference pattern. The second object moves along x with velocity v (and is associated with coordinate system O ) with respect to the first ( at rest , associated with coordinate stem O). 

Figure 55. Beam path of a typical infrared microscope I = Infrared transmittance beam II = Infrared reflectance beam Ml =Condensing mirror M2 and M3= Cassegrain objectives M4 = Movable, semi-transparent mirror ...

Fig. 3 A scheme of the LICRM setup operating under compressive stress, 1, Laser light source 2, movable corner reflector 3, polarizer 4 and 5, photocells 6 and 7, semi-transparent mirrors 8, stationary corner reflector 9, specimen 10, support 11, puncheon 12, clock-like scale micrometer for rough controlling deformation 13, dampers 14, figured lever providing a stress constancy 15, load 16, oil damper 17, cooling unit 18, heater 19 and 20, programmable temperature regulator 21, amplifier 22, tape recorder 23, oscillograph 24, shaper of a meander (Schmitt trigger) 25, computer with the interface board imbedded...

Augmented reality consists of a combination of informational elements of virtual reality with scenes of physical reality. With the use of devices and techniques (semi-transparent mirrors, semitransparent screens, stereoscopic projection) can be added synthetic visual information to complement existing physically visual information in a scene. (Silva et al., 2009). 

Definition for dual function systems A combination of a CMS and a Class 1 mirror. In such systems, a monitor complying with UN R.46 is placed behind a semi-transparent mirror complying with UN R.46. It is possible for the driver to... 

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