Abstract: A sequential wavefront sensor comprises a light beam scanning module, a sub-wavefront focusing lens, a detector with more than one photosensitive area and a processor for calculating the sequentially obtained centroids of a number focused light spots from the sub-wavefronts to determine the aberration of the input wavefront. A sequential wavefront sensing method comprises the steps of; sequentially projecting a number of sub-wavefronts onto a sub-wavefront focusing lens and a detector with more than one photosensitive areas, calculating the centroid of the focused light spot from each sub-wavefront, and processing the centroid information to determine the aberration of the wavefront.

Abstract: In embodiments of optical arrangements of a working distance sensor in a fundus camera that can improve the determination of a correct working distance as well as the transverse positioning of the camera a number of near infrared light sources are arranged to project a number of near infrared illumination beams into the visible light illumination path of the fundus camera and a live view of the retina under near infrared illumination is captured and displayed on a monitor. These embodiments of optical arrangements and associated methods will enable an operator to directly determine if there is any undesirable flare or other artifact appearing within a designated region on the infrared retina view as a result of a wrong alignment of the fundus camera with respect to the eye in terms of not only the working distance but also the horizontal and vertical positions. Pattern recognition algorithms can be used to further enhance the positioning sensitivity of the working distance sensor.

Abstract: A light delivery technique includes optical configurations as well as the associated methods that generate a ring beam from a linear light source. In one embodiment, a remote light source module delivers illumination light to a fundus camera and/or slit lamp. In another embodiment, an arrangement combines the use of a light pipe homogenizer and a ring beam transformer for efficiently collecting light from a substantially axially linear light source, homogenizing the collected light that lacks low angle flux relative to the optical axis, and transforming the light into a ring beam with a substantially improved low angle flux distribution. In still another embodiment, light emitted from a substantially axially linear light source is directly collected by a curved surface mirror and spatially filtered into a ring beam.

Abstract: The present invention comprises a system and method for secure session management and authentication between web sites and web clients. The method includes both secure and non-secure communication protocols, means for switching between secure and non-secure communication protocols, a session cookie and an authcode cookie. The session cookie is used for session management and the authcode cookie is used for authentication. The session cookie is transmitted using a non-secure communication protocol when the web client accesses a non-secure web page, whereas, the authcode cookie is transmitted using a secure communication protocol when the web client accesses a secure web page. Session management architecture and usage of two distinct cookies along with both secure and non-secure communication protocols prevents unauthorized users from accessing sensitive web client or web site information.

Abstract: A cleaning apparatus includes an elongated housing bounding a chamber with a motor disposed therein. A drive shaft is at least partially disposed within the chamber of the housing, the drive shaft being coupled with the motor such that during selective operation of the motor the drive shaft is rotated continuously. A brush head has a plurality of bristles mounted thereon. A hub is disposed on the brush head and has an elongated channel bounded by a pair of spaced apart engagement surfaces. A spherical head is disposed within the channel so as to selectively bias against the engagement surfaces, the spherical head being eccentrically disposed on the drive shaft such that the spherical head reciprocally rotates the brush head when the drive shaft is continuously rotated.

Abstract: A cleaning apparatus includes an elongated housing bounding a chamber with a motor disposed therein. A shaft is at least partially disposed within the chamber of the housing, the drive shaft being coupled with the motor such that during selective operation of the motor, the drive shaft is rotated continuously. A brush head is coupled with the drive shaft and has a plurality of bristles mounted thereon, the brush head has a rotational axis about which the brush head continuously or reciprocally rotates.

Abstract: The present invention comprises a system and method for secure session management and authentication between web sites and web clients. The method includes both secure and non-secure communication protocols, means for switching between secure and non-secure communication protocols, a session cookie and an authcode cookie. The session cookie is used for session management and the authcode cookie is used for authentication. The session cookie is transmitted using a non-secure communication protocol when the web client accesses a non-secure web page, whereas, the authcode cookie is transmitted using a secure communication protocol when the web client accesses a secure web page. Session management architecture and usage of two distinct cookies along with both secure and non-secure communication protocols prevents unauthorized users from accessing sensitive web client or web site information.