Multi-focal Lenses (DOE)

  • Update:Jun 14, 2017
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Multi-focal Diffractive Optical Element (DOE) allows to focus a single incident beam simultaneously at several focal planes along the propagation axis.

Product Introduction

Multi-focal Diffractive Optical Element (DOE) allows to focus a single incident beam simultaneously at several focal planes along the propagation axis.

We have a vast variety of solutions for multiple foci along the optical axis:

The Multifocal Diffractive Optical Elements (DOE’s) allow a single incident beam to focus simultaneously at several focal lengths along the propagation axis.

From a collimated input beam (single mode or multi-mode), the output beams focussed at a fixed number of focal lengths, predetermined during the design of the Multifocal DOE based on the customer's system requirements.

The Multifocal DOE comes in two configurations:

A DOE consisting of a Plano-convex lens with predetermined focal length, and a diffractive pattern, etched on its Plano side.

For more flexibility, a window DOE, thus, to get the foci spots at certain distances, the user adds a regular focusing lens after the DOE. The lens focal length determines the working distance (WD).

The Multifocal DOE can also be used as quasi elongated focus elements, increasing effectively the depth of focus in applications such as laser glass cutting and laser micro machining.

PN λ[nm] Number of Foci Element Size [mm] Average separation between foci [um] Remarks
BF-005-I-Y-A 1064 2 25.4 598  
MF-001-I-Y-A 1064 5 15 112.8  
MF-002-I-Y-A 1064 7 25.4 95.3  
MF-005-I-Y-A 1064 4 11 549  
MF-006-I-Y-A 1064 15 11 610.4  
MF-007-I-Y-A 1064 5 11 146.6 High Efficiency
BF-006-I-Y-A 1064 2 11 1995  
BF-014-I-Y-A 1064 2 11 301  
BF-015-I-Y-A 1064 2 25.4 31  
TF-008-I-Y-A 1064 3 11 535.7  
MF-003-I-Y-A 1064 9 15 68.5  
MF-004-I-Y-A 1064 11 25.4 121.3  
TF-004-I-Y-A 1064 3 11 150.5  
TF-005-I-Y-A 1064 3 25.4 15.5  
TF-010-I-Y-A 1064 3 11 667.4  
TF-011-I-Y-A 1064 3 11 414.7  
MF-009-I-Y-A 1064 6 15 94.5  
MF-011-I-Y-A 1064 5 11 238.1 orders 0,-1,-2,-3,-4
MF-012-I-Y-A 1064 15 25.4 125.6  
MF-013-I-Y-A 1064 5 11 192.3  
TF-012-I-Y-A 1064 3 11 226  
BF-021-I-Y-A 1064 2 38.1 5429.9  
BF-016-I-Y-A 1064 2 25.4 13.3  
BF-008-I-Y-A 1064 2 11 1071.5  
BF-017-I-Y-A 1064 2 11 1334.8  
BF-018-I-Y-A 1064 2 11 829.4  
BF-019-I-Y-A 1064 2 11 452  
TF-003-I-Y-A 1064 3 25.4 299  
TF-009-I-Y-A 1064 3 11 997.5  
BF-020-I-Y-A 1064 2 11 1602.6  
MF-008-I-Y-A 1064 5 15 112.8 High Efficiency
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