For monochromatic illumination at any chosen wavelength between 220 and 440 m i l l i c r o n s . . . AMM00MC1H6 W E MEW
ULTRAVIOLET WONOCHROWAW
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T h e Farrand UV Monochromatic Illuminator was designed to yield monochromatic illumination at any chosen wavelength between 220 and 440 millimicrons in the ultraviolet range, using sources such as the H3, H4, H6, etc. mercury arcs. The instrument is small, compact and convenient to use with microscopes, colorimeters, photometers and similar instruments. It can be set up with auxiliary equipment for making transmission, absorption, emission, radiation, reflection, fluorescence and phosphorescence measurements or used for irradiation purposes. The dispersing element is a reflection type, aluminized replica grating, 14400 lines per inch.
SPECTRAL RANGE: 2 2 0 - 2 4 0 η\μ DISPERSING ELEMENT: Replica grating, reflecting type, 14400 lines /in. FOCAL LENGTH :
160 mm.
FREE APERTURE :
45 m m . F:3.5
DISPERSION :
11 m/i/mm in first order.
SCATTERED ENERGY: At 313 m/i less than 1%. TRANSMISSION :
Greater than 30% at 313 χημ.
SLITS :
Height, 19 mm, fixed slit widths interchangeable.
WAVELENGTH DIAL: Calibrated in 10 ταμ steps, readable in increments of 2 πιμ.
The replica grating is mounted on a heavy glass plate, supported on a metal yoke coupled to the shaft and motivated by a wavelength drive. For further information send for farrand
WGiNEER/Nc ^SEARCH D£v £L0PMEHT JXSIGN and
Bulletin No. 8 1 !
MHUFACTURE
FARRAND OPTICAL CO. INC. BRONX BOULEVARD & EAST 2 3 8 t h STREET, NEW YORK 7 0 , Ν. Υ.
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"I«0H,C £'
JCENTIFIC '"STRUhlEHTS
For further information, circle number 22 A on Readers' Service Card, page 41 A
22 A
ANALYTICAL
CHEMISTRY
