Method to improve filter wheel imaging system data capture rate and add functionality through the use of an improved filter wheel design
View Patent ↗This disclosure describes a method of improving filter wheel imaging data capture and other functionality through use of an improved filter wheel design with pie shaped filter segments, continuously rotating image capture, multiple filtered images, and easily removable and attachable filter segments.
1. A method of increasing the image capture rate of a filter wheel image capture system having a lens creating an optical axis, a filter wheel having three or more triangle shaped filter wheel filter segments enclosed in frames, and an image capture sensor comprising:
said filter segments enclosed in frames with said frames radially and sequentially directly attached to a non-stepping continuously rotating filter wheel that is positioned normal to the optical axis behind a lens transmitting telecentric or collimated light rays and in front of an image capture sensor;
then first synchronizing said non-stepping continuously rotating filter wheel's rotational position with an image capture signal;
then initiating said image capture signal at the time one of said filter segments enclosed in frames completely covers said image capture sensor; and,
then terminating said image capture signal prior to said image capture sensor being covered by the next of said filter segments enclosed in frames.
2. The method of claim 1 wherein said filter segments enclosed in frames on said non-stepping continuously rotating filter wheel pass over said image capture sensor at a rate that matches the minimal time required by said image capture sensor to capture an image.
3. The method of claim 1 further comprising synchronizing said non-stepping continuously rotating filter wheel's rotational speed and said image capture signal with said non-stepping continuously rotating filter wheel's rotational position and capturing images while said image capture sensor is covered by two adjacent filter segments enclosed in frames.
4. The method of claim 1 further comprising interchangeable filter segments enclosed in frames that are variable in size and removably attached to said non-stepping continuously rotating filter wheel.