초록

An imaging system includes an extended depth of field (EDOF) optical system, a sensor on a sensor substrate, and a securing mechanism adapted to secure the EDOF optical system directly to the sensor substrate.

대표청구항 ▼

1. An imaging system, comprising: an extended depth of field (EDOF) optical system, wherein the EDOF optical system is a single element including a phase element adapted to provide a more uniform modulation transfer function over a range of focus than the optical system alone, wherein an effective f

1. An imaging system, comprising: an extended depth of field (EDOF) optical system, wherein the EDOF optical system is a single element including a phase element adapted to provide a more uniform modulation transfer function over a range of focus than the optical system alone, wherein an effective focal length of light output from the phase element is a function of at least one of an angular component and a radial component on which the light is incident on the phase element;a sensor on a sensor substrate; anda securing mechanism adapted to secure the EDOF optical system directly to the sensor substrate. 2. The imaging system as claimed in claim 1, wherein the sensor substrate includes a package surrounding the sensor. 3. The imaging system as claimed in claim 2, wherein securing mechanism attaches the EDOF optical system to the package, the package and the EDOF optical system enclosing the sensor. 4. The imaging system as claimed in claim 1, wherein the securing mechanism includes standoffs between a bottom surface of the EDOF optical system and the sensor substrate. 5. The imaging system as claimed in claim 4, wherein the standoffs are integral with the bottom surface of the EDOF optical system. 6. The imaging system as claimed in claim 5, wherein the bottom surface of the EDOF optical system and the standoffs enclose the sensor. 7. The imaging system as claimed in claim 4, wherein the bottom surface of the EDOF optical system and the standoffs enclose the sensor. 8. The imaging system as claimed in claim 1, wherein the function includes a radial component and an angular component. 9. The imaging system as claimed in claim 8, wherein the angular component and the radial component of the function are separable. 10. The imaging system as claimed in claim 9, wherein the angular component is a first order equation and the radial component is a second order equation. 11. The imaging system as claimed in claim 1, wherein the angular component approximates sin(θ/2). 12. The imaging system as claimed in claim 1, wherein a deviation between modulation transfer functions (MTFs) within a range of at least 5% of a height between the sensor and the EDOF optical system, around a focus is less than about 0.1 MTF. 13. The imaging system as claimed in claim 1, further comprising an electrical I/O on a same surface of the sensor substrate as the sensor. 14. The imaging system as claimed in claim 1, further comprising an electrical I/O on a surface of the sensor substrate opposite the sensor. 15. A mobile phone including an image system according to claim 1. 16. A portable computer including an image system according to claim 1. 17. A method of making an imaging system, comprising: providing an extended depth of field (EDOF) optical system, wherein the EDOF optical system is a single element including a phase element adapted to provide a more uniform modulation transfer function over a range of focus than the optical system alone, wherein an effective focal length of light output from the phase element is a function of at least one of an angular component and a radial component on which the light is incident on the phase element; andsecuring the EDOF optical system directly to a sensor substrate having a sensor. 18. The method as claimed in claim 17, wherein securing includes securing a plurality of EDOF optical systems to the sensor substrate having a corresponding plurality of sensors thereon, creating a plurality of imaging systems on the sensor substrate. 19. The method as claimed in claim 18, further comprising separating along the z-axis of the sensor substrate to form individual imaging systems from the plurality of imaging systems. 20. The method as claimed in claim 17, wherein securing seals the sensor. 21. The method as claimed in claim 17, wherein securing includes attaching the EDOF optical system to a package on the sensor substrate surrounding the sensor. 22. An imaging system, comprising: an extended depth of field (EDOF) optical system;a sensor on a sensor substrate, wherein a deviation between modulation transfer functions (MTFs) within a range of at least 5% of a height between the sensor and the EDOF optical system, around a focus is less than about 0.1 MTF; anda securing mechanism adapted to secure the EDOF optical system directly to the sensor substrate.