Koninklijke Philips Corporation N.v.

Van Lankvelt, Petrus J. W.

Albert H J Immink

Eise Carel Dijkmans

Stein Kuiper

Coen Adrianus Verschuren

Bernardus H W Hendriks

Marius Iosif Boamfa

Femke Karina De Theije

Thea Van Der Wijk

Menno W J Prins

Remco Den Dulk

Ivon Franciscus Helwegen

Maatje Koets

Marco A J Van As

Johannes A T M Van Den Homberg

Andre G J Slenter

James J A McCormack

Hendrik S Van Damme

Wendy U Dittmer

Harold J A Brans

Mara J J Sijbers

Albert F E Gootzen

Petrus J W Van Lankvelt

Dirk J N Vananderoye

Jeroen H Niewenhuis

Michel J M Bruyninckx

A controllable optical lens system, comprises a chamber housing first and second fluids, the interface between the fluids defining a lens surface. An electrode arrangement controls the shape of the lens surface and has first and second electrodes. A parameter is determined by the system dependent on the electrical resistance through at least one of the lens fluids between the first and second electrodes. Thus, the series resistance through a lens fluid is used as a measure of meniscus position.

Controllable optical lens

A device according to the invention for writing information to an information carrier ( ) includes conversion means ( ) for converting symbols in an information signal (S ) into pulse sequences in a control signal (S ). The device further includes a transducer ( ) for generating a physically detectable pattern on the information carrier ( ) in response to the control signal (S ). The conversion means ( ) include assignment means ( ) for assigning properties of the pulse sequences to symbols in the information signal (S ). These properties include the duration and the magnitude of pulses in the pulse sequence. The conversion means ( ) further include at least one counter ( ) for supplying a count signal (TC ) after a time interval, which counter is coupled to the assignment means ( ). The conversion means ( ) further include a controllable delay line ( ) coupled to the at least one counter ( ), for delaying the count signal (TC ), and to the assignment means ( ).

Thermomagnetic writing of pulse sequences of controlled magnitude and variably controlled duration

A device has a first operational state for writing information onto a record carrier and a second operational state for reading information from a record carrier. The device includes a phase-locked loop for generating a clock signal from a reference signal and a control unit for generating a pulsed transducer control signal in response to an information signal and the clock signal. The device also includes a generating transducer for generating physically detectable patterns in the record carrier in response to the transducer control signal and a read transducer for generating a read signal in response to physically detectable patterns in the record carrier in the second operational state that includes a radiation source. The device further includes a power supply which supplies the radiation source with an electric power. The phase-locked loop includes a memory for memorizing, in the first operational state, a memory value which is a measure of the supplied clock signal. In the second operational state, the phase-locked loop generates the clock signal in response to the memorized memory value and causes a high-frequency modulation in the electric power supplied by the power supply.

Device having a first operational state for writing information onto a record carrier

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Eindhoven, Netherlands

Albert H J Immink