Long pass

Figure 4.6 Block diagram of the apparatus for the fluorescence depolarization measurement. The dashed and solid arrows indicate the light paths ofthe excitation pulse and the fluorescence from the sample. OBJ microscope objective, M mirror, L lens, DM dichroic mirror, LP long-pass filter, PH pin-hole, PBS polarizing beam splitter, P polarizer, PMT photomultiplier.

Fig. 4.4. RLD FLIM of (A) unstained freshly resected human pancreas imaged though a macroscope at 7.7 frames per second and (B) unstained sheep s kidney imaged through a rigid endoscope at 7 frames per second. Both samples illuminated at excitation wavelength of 355 nm and fluorescence imaged through a 375 nm long pass filter. Adapted from Fig. 3 of Ref. [18].

Bulk silicon constitutes an optical long-pass filter, as shown in Fig. 7.6. The same is true for micro- and mesoporous silicon, for which the effective medium approximation (EMA) is valid in the visible regime. The dimensions of macroporous silicon are in the visible regime and the EMA becomes invalid. 

Figure 11.15. Schematics of the optical arrangement and temperature probes for the Cr+ fluorescence lifetime-based fiber optic thermometers. F = short-pass optical filter Fa = bandpass or long-pass optical filter LD = laser diode LED = light emitting diode S = the fluorescence material used as sensing element vm = signal to modulate the output intensity of the excitation light source v/= the detected fluorescence response from the sensing element.

Analyze with a flow cytometer with an argon-ion laser tuned to 488 nm. Record the light emitted into the red fluorescence photomultiplier tube (PMT) using a 620-nm long pass filter in front of the PMT. 

Other charges from opponents of psychedelic therapy have attributed bias and excessive enthusiasm to workers with the drugs. Certainly, some of the early papers were extravagant, as tends to happen with new therapies. But the time has long passed when psychedelics could be hailed as a panacea and... 

Fig. 5.6. A block diagram of an optical coherence tomography/Raman spectroscopy system C, circulator RSOD, rapid scanning optical delay BP, 785 bandpass BSO, beam shaping optics DM1, dichroic mirror at 990 nm DM2, dichroic mirror at 800-950 nm LP, long pass at 808 nm GP, galvanometer pair BD, balanced detector BPF, electronic band-pass filter AI-AO DAQ, analog input-output data acquisition (reprinted with permission from [34]. Copyright 2008 Optical Society of America)...

A single rhB molecule absorbs 1600 photons/s or 48,000 photons during a 30-s acquisition time. Considering the photocathode efficiency at the fluorescence maximum ( 8%), the NA of the MCP ( 40%), the objective lens collection efficiency (—17%), the net transparency of the objective lens used at the fluorescence maximum ( 60%),13 and the transparency of the dichroic mirror used here ( 90%) and the long-pass filter (—90%), we obtain 100 fluorescence photons during a 30-s acquisition time assuming f = 1. 

The use of both natural and synthetic mordant dyes has long passed its zenith. Synthetic mordant dyes are still listed as leather dyes in the Colour Index. These are chiefly monoazo dyes, which are used especially for prechromed wool. For leather, the operations involved in the metallization step are too complex and time-consuming. Nowadays, modem tanneries prefer premetallized dyes. 

Figure 15.5 Schematic of instrumental apparatus. The DT/MH-functionalized AgFON was surgically implanted into a rat with an optical window and integrated into a conventional laboratory Raman spectroscopy system. The Raman spectroscopy system consists of a Ti sapphire laser (Acx = 785 nm), band-pass filter, beam-steering optics, collection optics, and a long-pass filterto reject Raleigh scattered light. All of the optics fit on a 4 ft x 10 ft optical table.

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