Patent ID: 7335901

Claim:
A method of setting an output level of a light delivery device ( 10 ) that comprises light-emitting means ( 12 ), light output means ( 24 ; 24 , 26 ) for delivering emitted light to a site to be irradiated, intensity control means ( 16 ) for adjusting at least the intensity of the delivered light, and a memory unit ( 30 ) for storing data including parameters indicative of intensity/power level, the light output means ( 24 ; 24 , 26 ) being temporarily connected to a separate radiometer ( 38 ) having means for detecting power levels of the delivered light, the light delivery device ( 10 ) and the radiometer ( 38 ) having respective control means ( 28 , 48 ) and data communications means ( 34 , 36 , 54 , 56 ) for communicating data therebetween, the method comprising a calibration sequence comprising the steps of: (i) with the light output means ( 24 ; 24 , 26 ) coupled to the radiometer ( 38 ), establishing data communications between the control means ( 48 ) of the radiometer ( 38 ) and the control means ( 28 ) of the light delivery device ( 10 ); at the light delivery device ( 10 ): (ii) adjusting the intensity control means ( 16 ) successively to each of a series of predetermined intensity levels; at the radiometer ( 38 ): (iii) measuring a series of actual output irradiance levels delivered by the light output means ( 24 ; 24 , 26 ), each for a respective one of said predetermined intensity levels; (iv) transmitting the actual output irradiance levels to the light delivery device ( 10 ); at the light delivery device ( 10 ): (v) associating each of the actual output irradiance level measurements with the corresponding intensity level parameters in said memory unit.