Avago Technologies Ecbu IP (singapore) Pte. Ltd.

Avago Technologies General IP (singapore) Pte. Ltd.

Avago Technologies Ecbu IP Pte. Ltd.

Wee Jin Yeap

Weng Fei Wong

Yee Loong Chin

Chee Foo Lum

Sze Kuang Lee

Kok Hing Fo

Cheng Kwong Cheang

Kean Foong Ng

Hock Aun Tan

Toshiya Hataguchi

Siang Leong Foo

Cheng Why Tan

Saiful Bahari Bin Saidan

Randeep Singh A/l Amarjit

Yik-Foong Soo

Randeep Singh A/l Amarjit Singh

Disclosed are various embodiments of high-speed, high-performance, low-noise, low-cost, compact, optical encoders having a multi-faceted flat-faced lens is disposed over the light emitters and light detectors thereof. Disclosed also are various means for preventing undesired stray light from reaching light detectors incorporated therein. Structures employed to block stray light in the optical encoders include light barriers, air gap trenches, and coatings disposed between first and second sides of a substrate of the encoder. Methods of making such optical encoders are also disclosed.

Optical reflective encoder with multi-faceted flat-faced lens

An optical encoder and optical encoding system are disclosed. Specifically, an encoder having a light detector elevated relative to a light source is described. The relative height difference between the light source and the light detector enables the optical encoder to minimize noise at the light detector without requiring a separate light baffle between the light source and light detector. Methods of manufacturing and operating such an encoder are also described.

Enhanced optical reflective encoder

Disclosed are various embodiments of high-speed, high-performance, low-noise optical encoders having various means for preventing undesired stray light from reaching light detectors incorporated therein. Structures employed to block stray light in the optical encoders include light barriers, air gap trenches, and coatings disposed between first and second sides of a substrate of the encoder. Also disclosed are compact single track optical encoders having a single dome lens disposed thereover, and dual track triple dome lens optical encoders. Methods of making such optical encoders are also disclosed.

Optical encoder systems, devices and methods

Single dome lens reflective optical encoder

An optical encoder includes a code strip having a first side, a second side, a first track comprising indicia thereon, and a second track comprising indicia thereon. The code strip is moveable along a displacement path with respect to the optical encoder. A light source positioned on the first side of the code strip directs light toward the code strip. A first detector element is positioned on the second side of the code strip and is generally aligned with the first track of the code strip. A second detector element is positioned on the second side of the code strip and is generally aligned with the second track of the code strip. The second detector element is also positioned so that the second detector element is located a spaced distance along the displacement path from the first detector element.

Optical encoder

Optical encoders having one or more of a number of disclosed features are disclosed. The features of the optical encoder in accordance with the present invention include a symmetrical (for example, circular) emitter; baffle between the emitter and a detector; double-dome or single-dome encapsulant; multiple detector; and multiple (at least three) data channels.

Reflective encoders with various emitter-detector configurations

Growing community of inventors

Penang, Malaysia

Wee Jin Yeap