30多年來(lái)，ASL公司的眼睛追蹤儀技術(shù)一直處于領(lǐng)先地位。ASL是首家生產(chǎn)頭戴式眼睛追蹤儀、眼睛/頭部追蹤儀集成系統(tǒng)、視差鏡片、頭部定位遠(yuǎn)程協(xié)助鏡片和許多其它產(chǎn)品的公司，現(xiàn)在這些產(chǎn)品都已成為行業(yè)的標(biāo)準(zhǔn)。正是由于這種創(chuàng)新精神，公司才能不斷地生產(chǎn)出當(dāng)今世界最廣泛最全面的眼睛追蹤儀視頻產(chǎn)品。?

眼睛追蹤儀技術(shù)

ASL 將瞳孔/角膜反射技術(shù)用于測(cè)量眼球運(yùn)動(dòng)。在大多數(shù)應(yīng)用中，ASL公司使用的明亮環(huán)境下優(yōu)質(zhì)的瞳孔圖像，遠(yuǎn)遠(yuǎn)超過(guò)了黑暗環(huán)境中的瞳孔圖像。ASL發(fā)現(xiàn)，在充足光線(xiàn)背景下的瞳孔圖像，受睫毛、眉毛、眼睛顏色深淺、暈暗的環(huán)境、眼鏡及接觸的影響較小，同時(shí)該系統(tǒng)受相機(jī)距離的影響也較小。在功能性磁共振環(huán)境下，鏡片放置在離眼睛16英尺的距離內(nèi)，該系統(tǒng)的鏡片則會(huì)起相當(dāng)重要的作用。

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在戶(hù)外環(huán)境中，ASL可利用專(zhuān)門(mén)的黑暗瞳孔放大技術(shù)。這些鏡片的專(zhuān)門(mén)用于戶(hù)外環(huán)境，尤其是強(qiáng)光下使用。

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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.

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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.?

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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.

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