Luminex Illuminating Magnifier. 
(Regd. Design No. 771009.) 
The Luminex magnifier is the latest development in magnifiers, the source of light for the 
illumination of the object being contained in the instrument. By means of a specially shaped 
reflector the light is condensed into a brilliant patch which shows detail in the most effective 
manner. The convenience of this method is readily seen, as however inaccessible the object may 
be, or in whatever position the magnifier is held, an intense light is thrown upon the object. 
The Luminex is made in a fixed focus model, focussing the object just below the rim of the 
reflector. This has a power of x10. 
Another model, made with a power of either X10, X15 or x20, has a focussing motion to 
the lens, so that the magnifier may be rested upon an object and the image brought into focus 
by the adjustment to the lens. The power x 20 is fitted with an achromatic lens, giving at this high 
magnifying power a field of view free from aberration. 
A model containing a graduated scale which is seen superimposed upon the object being 
viewed, so that measurements can be readily taken, is also manufactured ; this has a power of 
x10. A focussing adjustment is provided to the lens, bringing both scale and object into accurate 
focus. Any of the following scales can be supplied :— 
Squares over the whole field in either 
= +,4 or 1m/m. 
No. 8725. Luminex magnifier, fixed focus model, complete with lamp and battery {017 6 
No. 3726. Luminex magnifier, een focus model x10, complete with lamp 
din. straight scale divided into 10ths, 
50ths and 200ths of an inch. 
10 m/m. straight scale divided into 
100 divisions, ie., 1/10th of a 
millimetre. 
and battery .. e el O 
No. 3731. As No. 3726, but x15. 1 75.70 
No. 3732. As No. 3726, but x20, achromatic lens __.. Pg 74 (V) 
No. 3727. Luminex magnifier, scale model with one scale 2 SEO 
No. 3728. Extra scales for No. 3727 OiaaG 
Luminex microscope. This magnifier is similar‘to the other 
models in principle, but has a compound microscope giving a magni- 
fying power of x40 attached to it. It has a graduated scale in the 
eyepiece and reads to 1/1000th inch or 1/50th m/m. 
No. 3733. Luminex microscope in case ... oe EA NOO 
Film measuring Luminex. This is for use 
with a transparent object such as cinematograph 
film and enables measurements of frequencies on 
sound-tracks, size of perforations, etc., to be readily 
made. 
No. 3734. Film-measuring Luminex, x 10, 
in case with spare battery and 
bulb ... oun toy vor 70 
Lum lines 
Ex = 
= = BECK—LONDON 
= _LUMINE sx __ 2 
The illuminating torch is a 
standard article, so that replace- 
ments of lamps and batteries can be obtained anywhere. 
108 
