Fast Wave Front Measurement

A device for measuring wave fronts generated by a lens for an eye, comprising:

• a radiation source configured to emit radiation at a fixed preset wavelength to be directed at the lens;
• a sensor device configured to detect wave fronts of incident test radiation after interaction with the lens;
• wherein the sensor device detects the incident test radiation at a scanning frequency which is at least equal in size to the frequency at which changes in the wave fronts occur in the incident test radiation;
• and
• wherein the radiation source emits test radiation with a radiation emission frequency and changing wavelength in such a way that the scanning frequency is at least equal in size to the radiation emission frequency.

A method of measuring wave fronts generated by a lens for an eye, comprising:

• transmitting test radiation from a radiation source to the lens, the test radiation having a fixed preset wavelength;
• and
• detecting wave fronts of test radiation after interaction with the lens;
• wherein detection of the test radiation is done after interactions with the lens at a scanning frequency that is at least equal in size to the frequency at which changes in wave fronts occur in the test radiation after interaction with the lens;
• and
• wherein the test radiation is detected at a frequency of 100 Hertz or more.