Back to results
US 10,441,357 B2Granted
Device for cutting hair
AssigneeKoninklijke Philips N.V.
InventorsBastiaan Wilhelmus Maria Moeskops, Mark Thomas Johnson, Rieko Verhagen
Life of this patent
Estimating the term…
Abstract
A cutting head for a device for cutting hair is disclosed. The cutting head has an optical system configured to direct a laser beam along an optical axis across a cutting zone within the cutting head. The optical system has a variable focus lens configured to control the position of the focal point of the laser beam along the optical axis within the cutting zone.
Claims15
A hair cutting device head comprising:
- an optical system comprising:
- a variable focus lens configured to:
- focus a laser beam to a focal point;
- a first reflective element configured to:
- receive the laser beam;
- and
- re-direct said laser beam along a first optical axis within a cutting zone substantially parallel to a skin portion of a user;
- a second reflective element positioned on a side of the cutting zone opposite to the first reflective element, said second reflective element configured to:
- direct the laser beam back across the cutting zone along a second optical axis substantially parallel to the first optical axis within the cutting zone;
- and
- a controller configured to:
- vary characteristics of the variable focus lens to alter a position of the focal point of the laser beam within the cutting zone,
- wherein the focal point of a laser beam within the cutting zone is moved along the first optical axis of the re-directed laser beam in an oscillating motion.
10 more elements
A device for cutting hair, comprising:
- at least one cutting head comprising:
- an optical system comprising:
- a variable focus lens configured to:
- focus the laser beam to a focal point;
- a first reflective element configured to:
- direct the laser beam along a first optical axis within a cutting zone of said at least one cutting head,
- a second reflective element positioned on a side of the cutting zone opposite to the first reflective element, said second reflective element configured to:
- direct the laser beam back cross the cutting zone along a second optical axis substantially parallel to the first optical axis within the cutting zone;
- and
- a controller configured to:
- control a variation of a characteristic of the variable focus lens to alter a position of the focal point along the first optical axis of the laser beam within the cutting zone in an oscillating manner.
8 more elements
A method of controlling a device for cutting hair, comprising the steps of:
- directing, a laser beam in a first direction across a cutting zone substantially parallel to a surface containing said hair,
- directing said laser beam, in a second direction, opposite the first direction, substantially parallel to the laser beam in the first direction within the cutting zone;
- and
- varying a characteristic of a variable focus lens to position a focal point of the laser beam along the optical axis, wherein the characteristic of the variable focus lens is varied to cause the focal point to move in an oscillating manner.
1 more element
Dependencies are inferred from the claim text.