1
Tokuichi Tsunekawa, Akihiko Nagano, Kazuki Konishi: Visual line detecting device and camera having the same. Canon Kabushiki Kaisha, Robin Blecker Daley & Driscoll, July 30, 1991: US05036347 (96 worldwide citation)

A visual line detecting device is arranged to detect the Purkinje image position of an illuminated eye of an observer through light reflected by the eye and to detect the direction of the visual line of the observer from the Purkinje image position and the position of the pupil center of the eye. Th ...


2
Yasuo Suda, Akihiko Nagano, Kazuki Konishi: Optical apparatus having visual axis detector and determining whether eyeglasses are worn. Canon Kabushiki Kaisha, Fitzpatrick Cella Harper & Scinto, January 26, 1993: US05182443 (62 worldwide citation)

An optical apparatus includes a view finder through which a subject is observed, a visual axis detection device for detecting a direction of a visual axis of an observer who is looking into the view finder, and a determination device for determining whether or not the observer is wearing eyeglasses.


3
Akihiko Nagano, Akira Yamada, Kazuki Konishi: Camera provided with a visual axis direction detecting portion. Canon Kabushiki Kaisha, Fitzpatrick Cella Harper & Scinto, September 14, 1993: US05245371 (55 worldwide citation)

A camera is provided with observation means for observing a scene therethrough, a visual axis detecting device for detecting the visual axis direction of the eye of an operator looking into the observation means, an information receiving device for receiving the information of an objective lens, and ...


4
Akihiko Nagano, Kazuki Konishi, Akira Yamada, Yasuo Suda: Camera having visual axis detecting apparatus. Canon Kabushiki Kaisha, Robin Blecker Daley & Driscoll, May 25, 1993: US05214466 (52 worldwide citation)

A camera having a line of sight detecting apparatus to detect a line of sight of an eyeball of an observer comprises: a lens device having a movable lens; a detector to detect a moving state of the movable lens in the lens device; and a controller for making the line of sight detecting operation by ...


5
Kazuki Konishi, Akihiko Nagano, Tokuichi Tsunekawa: Camera. Canon Kabushiki Kaisha, Robin Blecker Daley & Driscoll, October 12, 1993: US05253008 (51 worldwide citation)

A camera comprising a gazing line detection device for obtaining the gazing point by detecting the movement of the gazing line of a user so that a proper photometry range is automatically set by selecting a specific method from a plurality of photometry methods in accordance with the distribution of ...


6
Goro Noto, Yasuo Suda, Akihiko Nagano: Solid-state image sensing element and its design support method, and image sensing device. Canon Kabushiki Kaisha, Fitzpatrick Cella Harper & Scinto, October 10, 2006: US07119319 (44 worldwide citation)

A solid-state image sensing element has a photoelectric conversion element which converts incoming light into an electrical signal in accordance with an amount of the light, a microlens which is arranged on an incident surface, a light guide which is arranged between the photoelectric conversion ele ...


7
Masao Yamanobe, Yasuyuki Watanabe, Hajime Sakata, Yukitoshi Ohkubo, Tomoyuki Umezawa, Chiori Mochizuki, Kazuya Ishiwata, Takayuki Ishii, Akihiko Nagano, Etsuro Kishi, Ryoji Fujiwara: Optical modulation device. Canon Kabushiki Kaisha, Fitzpatrick Cella Harper & Scinto, July 25, 1989: US04850681 (41 worldwide citation)

An optical modulation device for effecting optical modulation by controlling the diffraction phenomenon of light, which not only consumes a small amouhnt of the driving energy employed, such as a electric power, but which is also capable of improvements in reliability.


8
Akihiko Nagano, Etsuro Kishi, Ryoji Fujiwara, Yukitoshi Ohkubo, Michiyo Nishimura, Hajime Sakata, Takayuki Ishii, Masato Yamanobe: Optical modulation element having two-dimensional phase type diffraction grating. September 15, 1992: US05148302 (39 worldwide citation)

An optical modulation element characterized in that a two-dimensional phase type diffraction gratings, whose refractive index changes for each predetermined period along two different directions in a predetermined plane, is adopted, and a changing state of the refractive index is controlled to chang ...


9
Akira Yamada, Akihiko Nagano, Kazuki Konishi: Visual axis detection apparatus. Canon Kabushiki Kaisha, Fitzpatrick Cella Harper & Scinto, January 18, 1994: US05280312 (37 worldwide citation)

A visual axis detection apparatus in which an eye of an observer is illuminated by a light source, and the corneal reflection image of the eye and the reflected image of the iris are detected by a light sensor. By the utilization of the position information of each reflected image from the sensor, t ...


10
Akihiko Nagano, Kazuki Konishi, Tokuichi Tsunekawa: Visual axis detector using plural reflected image of a light source. Canon Kabushiki Kaisha, Fitzpatrick Cella Harper & Scinto, July 6, 1993: US05225862 (36 worldwide citation)

An optical apparatus which detects a visual axis using plural reflected images of a light source includes an observation device with which an observer observes an object. An image sensor is provided for generating a signal and response to an image. Optical structure is provided for forming a plurali ...