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美國Applied Science Laboratories
美國Applied Science Laboratories成立于1974年.30多年來，ASL公司的眼睛追蹤儀技術一直處于領先地位。ASL是首家生產頭戴式眼睛追蹤儀、眼睛/頭部追蹤儀集成系統、視差鏡片、頭部定位遠程協助鏡片和許多其它產品的公司，現在這些產品都已成為行業的標準。正是由于這種創新精神，公司才能不斷地生產出當今世界最廣泛最全面的眼睛追蹤儀視頻產品。

眼睛追蹤儀技術

ASL 將瞳孔/角膜反射技術用于測量眼球運動。在大多數應用中，ASL公司使用的明亮環境下優質的瞳孔圖像，遠遠超過了黑暗環境中的瞳孔圖像。ASL發現，在充足光線背景下的瞳孔圖像，受睫毛、眉毛、眼睛顏色深淺、暈暗的環境、眼鏡及接觸的影響較小，同時該系統受相機距離的影響也較小。在功能性磁共振環境下，鏡片放置在離眼睛16英尺的距離內，該系統的鏡片則會起相當重要的作用。

在戶外環境中，ASL可利用專門的黑暗瞳孔放大技術。這些鏡片的專門用于戶外環境，尤其是強光下使用。

ASL has been the leader in eye tracking technology for over 30 years. ASL was the first company to develop a head mounted eye tracker, Eye/Head integration, parallax free optics, head position assisted remote optics and many other features that now have become industry standard. This innovative spirit continues today with the world’s broadest and most comprehensive line of video based eye trackers.

Eye Tracking Technique

ASL utilizes the pupil/corneal reflection technique for measuring eye movements. In most applications, ASL operates with a bright pupil image, which provides many advantages over a dark pupil image. ASL has found that the bright pupil image is less affected by eyelashes, mascara, light colored eyes, dark environments, eyeglasses and contacts. The system is also less affected by distance from the camera. This has been determined to be especially important with optics in an FMRI environment, where the optics can be placed up to 16 feet from the eye.

In an outdoor environment, ASL uses a specially enhanced dark pupil technique. These optics are designed specifically for outdoor use and are particularly robust even in bright sunlight.
 

ASL has been a pioneer in the examination of human eye movement and pupil dynamics for over 30 years. Founded by M.I.T. scientists in 1962, ASL developed the first video based eye tracker in 1974.

ASL is the first company to develop head mounted optics, eye/head integration, parallax free optics, magnetic head tracking, assisted remote optics and many features that are now industry standard. Our innovative spirit continues to flourish. ASL offers the broadest and most comprehensive line of video based eye trackers.

ASL is the leader in the design, development, manufacturing and distribution of eye tracking equipment worldwide by providing specialty design and development services for the research and consumer marketplace.

The product range of ASL is continually being developed to incorporate new technology with the noteworthy goal of advancing the understanding of eye movement and dynamics. ASL has designed smaller, less expensive and more flexible devices to assist researchers operating under stringent budget guidelines.