Abstract:
One embodiment relates to an optical navigation device. The device includes a lead frame (102) having reference features, a laser (402), a detector array (404), and an optical component (106) having alignment features (206). The laser (402) is attached to the lead frame (102) and positioned in reference to the reference features (202) of the lead frame (102). The detector array (404) is attached to the lead frame (102) and positioned in reference to the reference features (202) of the lead frame. The optical component (106) is coupled to the lead frame (102) so that its alignment features (206) register to the reference features (202) of the lead frame (102). In this way, the molded optical component (106) is passively aligned to the laser (402) and the detector array (404). Other embodiments are also disclosed.
Abstract:
One embodiment relates to an optical navigation device. The device includes a lead frame (102) having reference features, a laser (402), a detector array (404), and an optical component (106) having alignment features (206). The laser (402) is attached to the lead frame (102) and positioned in reference to the reference features (202) of the lead frame (102). The detector array (404) is attached to the lead frame (102) and positioned in reference to the reference features (202) of the lead frame. The optical component (106) is coupled to the lead frame (102) so that its alignment features (206) register to the reference features (202) of the lead frame (102). In this way, the molded optical component (106) is passively aligned to the laser (402) and the detector array (404). Other embodiments are also disclosed.
Abstract:
One embodiment relates to a laser positioning device for sensing relative movement between a data input device and a surface (120) by determining displacement of image features in a succession of images of the surface. The device forms a single integrated package, which includes a planar substrate (102) and a transparent encapsulant that also embodies a collimating lens (108). Both a coherent light source (104) and a sensor array (106) and associated circuitry are configured on the planar substrate. Another embodiment relates to a method of sensing relative movement between a data input device and a surface. Coherent light is emitted from a laser and collimated so as to form a collimated illumination beam with a predetermined diameter, D, and a substantially uniform phase front. A speckle pattern is generated by impingement of the collimated illumination beam on the surface and detected by a sensor array. Other embodiments are also disclosed.
Abstract:
One embodiment relates to an optical displacement sensor for sensing relative movement between a data input device and a surface (304) by determining displacement of optical features in a succession of frames. The sensor includes an illuminator and a detector. The illuminator has a light source and illumination optics (506) to illuminate a portion of the surface (510) with a planar phase-front. The detector has a plurality of photosensitive elements (502) and imaging optics (512). The illuminator and the detector are configured such that the illuminated portion of the surface (510) is less than fifty percent larger than a field of view of the photosensitive elements (502) of the detector. Other embodiments are also described.
Abstract:
One embodiment described relates to an optical displacement sensor for sensing movement of a data input device across a surface (304) by detecting displacement of optical features in a succession of images of the surface (304). The sensor includes a detector having an array (for example, 1502) including a number (N) of sets of photosensitive elements, each set having a number (M) of photosensitive elements, where M is greater than two and not equal to four. Signals from each of the photosensitive elements in a set are electrically coupled or combined with (see, for example, 1202) corresponding photosensitive elements in other sets to produce a total of M independent group signals from M interlaced groups of photosensitive elements. Other embodiments are also described.
Abstract:
One embodiment relates to an optical displacement sensor for sensing movement of a data input device across a surface by determining displacement of optical features in a succession of frames. The sensor includes at least an illuminator (306), telecentric imaging optics (for example, 502 or 504) on the object (scattering surface) side, and an array of photosensitive elements (302). The illuminator (306) is configured to illuminate a portion of the surface (402). The telecentric imaging optics (for example, 502 or 504) is configured to image the optical features emanating from the illuminated portion of the surface (402), and the array of photosensitive elements (302) is configured to detect intensity data relating to the optical features imaged by the telecentric imaging optics (for example, 502 or 504). Other embodiments are also disclosed.
Abstract:
One embodiment relates to an optical navigation apparatus. The apparatus includes a hole in a surface of the apparatus, a light source providing an illuminating beam through said hole, an imaging system configured to receive light generated by an illuminated portion of a finger placed above said hole and to produce an image from the light at a detector plane, and a tracking sensor array positioned at the detector plane that is configured to detect lateral movement of said finger relative to said hole. In addition, the apparatus includes a lift sensor positioned at the detector plane that is configured to detect lifting of said finger above said surface of the apparatus. Other embodiments, aspects and features are also disclosed.
Abstract:
In one embodiment, an optical navigation sensor for a computer mouse (300) is designed to be operable on an optically transparent material (303). The optically transparent material (303) may include a contact surface (306) on which the mouse sits during normal operation. An optically rough tracking surface (305) is provided below the contact surface (306). The mouse (300) includes a light source (323) that illuminates an area on the contact surface (306) and an area on the tracking surface (305). The mouse (300) may include a tracking sensor (322) onto which the illuminated area on the tracking surface (305) is imaged to detect mouse displacement. The mouse (300) may also include a lift sensor (321) that picks up specular light reflected from the illuminated area on the contact surface (306) to generate lift information indicative of whether the mouse (300) has been lifted off the contact surface (306). Tracking of the mouse (300) displacement may be qualified with the lift information.
Abstract:
One embodiment relates to an optical navigation device. The device includes a lead frame (102) having reference features, a laser (402), a detector array (404), and an optical component (106) having alignment features (206). The laser (402) is attached to the lead frame (102) and positioned in reference to the reference features (202) of the lead frame (102). The detector array (404) is attached to the lead frame (102) and positioned in reference to the reference features (202) of the lead frame. The optical component (106) is coupled to the lead frame (102) so that its alignment features (206) register to the reference features (202) of the lead frame (102). In this way, the molded optical component (106) is passively aligned to the laser (402) and the detector array (404). Other embodiments are also disclosed.
Abstract:
One embodiment relates to a laser positioning device for sensing relative movement between a data input device and a surface (120) by determining displacement of image features in a succession of images of the surface. The device forms a single integrated package, which includes a planar substrate (102) and a transparent encapsulant that also embodies a collimating lens (108). Both a coherent light source (104) and a sensor array (106) and associated circuitry are configured on the planar substrate. Another embodiment relates to a method of sensing relative movement between a data input device and a surface. Coherent light is emitted from a laser and collimated so as to form a collimated illumination beam with a predetermined diameter, D, and a substantially uniform phase front. A speckle pattern is generated by impingement of the collimated illumination beam on the surface and detected by a sensor array. Other embodiments are also disclosed.