Improved Dark Room Lamp

An Improved Microscope Lamp.

The new inclined binocular microscopes when used with high-power objectives require much light to illuminate adequately the field of view. At least three times the light is necessary as for a similar optical combination on a monocular instrument. The ordinary opal bulbs even when over-run do not provide sufficient illumination, and of course with them there is no possibility of employing a ligh...

The dark-room test.

Improved Dark-adaptometer an Improved Dark-adaptometer*

SOME time ago an instrument was described in this Journal intended for testing dark-adaptation in -normal and sub-normal patients. However, when it was tried to investigate gross disturbances (e.g., retinitis pigmentosa), the need was felt for a wider range of readings. When re-designing the apparatus provisions were also made to change the colour of the test-light if desired in order to make t...

An improved objective slit-lamp fluorophotometer using tungsten-halogen lamp excitation and synchronous detection.

A new design of fluorophotometer is described. The instrument can measure lower concentrations of fluorescent dye with greater accuracy than previous models.

Improved radial heat sink for led lamp cooling

This paper presents a numerical study concerning an improved heat sink for a light emitting diodes (LED) lamp operating under natural convection conditions. Basic geometry of the heat sink is of cylindrical nature, to be obtained from cutting an aluminum extruded bar comprising a cylindrical central core and a number of uniformly distributed radial fins. Minimum diameter of the central core is ...