Milestones in the sixties

1960

DELTA develops and produces the first optical filters with a new method, so that DELTA to-day is one of the world's leading producers of advanced optical components.

1964

The Technical Audiological-Laboratory (TAL) is established and DELTA starts developing and testing hearing aids in order to help people with hearing handicaps.

1964

This 10,000-watt bulb was received by the Danish Light Laboratory (Lysteknisk Laboratorium) at the time of the laboratory's founding in 1964. Before then, the bulb had been used in either a lighthouse or at the B&W shipyards for projecting drawings onto steel plates.

Lying in the bottom of the bulb are pellets that were used for cleaning off the dark layer of film deposited on the inner surface of the glass by vaporisation from the filament.

1964

This was the first in Denmark and dates from around 1965. It was used for measuring the intensity of signals for establishing radio-link systems. The analogue signal enters the terminals on the left and slowly rotates a motor at the bottom of the device. The analogue signal is measured at each rotation.