Compact dual-LED illumination system
AssigneeZebra Technologies Corporation
InventorsVladimir Gurevich, Qing Tu
Life of this patent
Estimating the term…
Abstract
An optical assembly for illuminating at least one object appearing in a field of view (FOV). The optical assembly includes first and second illumination sources configured to provide first and second illumination to illuminate a target of the object. An aperture configured to collimate the first and second illumination and to provide the illumination to a dual collimator. The dual collimator is disposed to collimate the first and second illumination and to provide the first and second illumination to a dual microlens lens array (MLA). The dual MLA has microlens arrays configured to receive the collimated first and second radiation, to provide two illumination output fields, each output field having a different output illumination field angle.
Claims21
An optical assembly for illumination of a target, the optical assembly comprising:
- a first illumination source configured to provide first illumination along a first optical axis;
- a second illumination source configured to provide second illumination along a second optical axis, the second optical axis being not coaxial with the first optical axis;
- an aperture element having a first aperture disposed along the first optical axis and a second aperture disposed along the second optical axis, the first aperture configured to transmit the first illumination and the second aperture configured to transmit the second illumination;
- a collimator element having a first collimator disposed along the first optical axis and a second collimator lens disposed along the second optical axes, the collimator element configured to receive the first illumination and the second illumination from the aperture element and further configured to collimate the first illumination and the second illumination;
- and
- a microlens array element having a first microlens array disposed along the first optical axis and a second microlens array disposed along the second optical axes, the microlens array element having a first surface and a second surface, and the microlens array element being configured to receive, at the first surface, the first illumination and the second illumination from the collimator element and further configured to provide, from the second surface, a first output illumination field and a second output illumination field, wherein optical properties of the first microlens array are different from optical properties of the second microlens array.
Dependencies are inferred from the claim text.