Fused Silica Fly-Eye Lenses & Model Sizes

Custom Fly-Eye Glass Lenses

A fly-eye lens is a two-dimensional array of small lenslets used to divide and remix light. In an illumination system, the lenslets create multiple images of the source that overlap at a target or pupil plane, reducing hot spots and improving field uniformity.

China Lampoptics has disclosed production experience with stage-light fly-eye glass. The array is defined by lenslet geometry, pitch, active area and its position relative to the source, condenser and target plane.

Specification note: Numerical ranges shown on this page are preliminary engineering references for project screening. The quotation and approved drawing define the final material, dimensions, tolerances, processing route and inspection method.

Dark Square Array for custom fly-eye glass lenses

Clear Rectangular Array for custom fly-eye glass lenses

Fly-Eye Optical Function

Source division: each lenslet samples a portion of the incoming beam
Angular redistribution: lenslet focal power redirects each sampled portion
Field overlap: a second array or condenser overlaps the sub-images
Homogenized output: the target plane receives a more uniform illuminated field

Array Configurations

Configuration	System role	Typical use
Single fly-eye array	Redistributes a source where the downstream optics complete the mixing	Compact lighting systems
Matched array pair	Controls both sampling and angular overlap	Projection and stage illumination
Rectangular lenslet grid	Matches square or rectangular illuminated fields	Projectors and stage fixtures
Circular array	Fits a round optical barrel or beam	Spotlights and instruments
Cylindrical fly-eye array	Homogenizes mainly in one axis	Line and slit illumination

Fly-Eye Lens Specifications

Source size and divergence	Defined by the selected source and optical model
Lenslet aperture	Made to the approved drawing; production limit confirmed after tooling review
Pitch X / Y	Made to the approved drawing; production limit confirmed after tooling review
Lenslet sag / profile	Defined in the released optical prescription
Lenslet focal length	Defined in the released optical prescription
Active area	Confirmed after drawing, sample and process review
Substrate thickness	Made to the approved drawing; production limit confirmed after tooling review
Array-to-array spacing	Defined by the homogenizer system design
Target plane and field size	Specified measurement plane and usable field
Uniformity metric and limit	Agreed metric and acceptance limit for the target plane

Uniformity must be measured at the specified plane and field size. A photograph taken at an arbitrary distance cannot replace a defined spatial-uniformity measurement.

Fused Silica Fly-Eye Lens Model Reference

Fused-silica fly-eye lenses are available in single-sided and double-sided array configurations for beam homogenization and illumination shaping. Reference models range from compact micro-optics to approximately 52 mm substrates. Array outlines include square, rectangular, circular and hexagonal forms.

Fly-eye and microlens array samples with different outlines and lenslet layouts — Fly-eye array configurations with different substrate outlines and lenslet layouts.

Square fly-eye lens array with repeated lenslets — Square fly-eye array: repeated lenslets on a square substrate.

Rectangular fused silica fly-eye homogenizer array — Rectangular fly-eye array: substrate proportions and mounting edges are drawing-controlled.

Circular fly-eye glass lens array with hexagonal lenslet pattern — Circular substrate with a closely packed lenslet pattern.

Array configurations	Single-sided and double-sided lenslet arrays
Material wavelength reference	193–3000 nm for the stated fused-silica material family; finished-part transmission depends on grade, thickness, surface and coating
Lenslet size and pitch	Fly-eye reference 0.2–5.0 mm; individual catalog models include pitches from 0.13 mm to 4.10 mm
Typical applications	Micro-projection, vehicle HUD illumination, 3D-printing optics, photolithography illumination, wavefront sensing, laser and LED beam homogenization

Table notes: Dimensions are in millimeters. Pitch describes lenslet spacing; BFL is back focal length. Model selection depends on the operating wavelength, source geometry and spacing within the optical system.

Double-sided fly-eye models (41)

Model	L × H/Ø × T	Pitch	BFL	Optical surfaces
FE0505016D	5.00 × 5.00 × 1.60 mm	0.38 × 0.28 mm	1.10 mm	Double
FE0606012D	6.50 × 6.50 × 1.25 mm	0.22 × 0.12 mm	0.87 mm	Double
FE0808021D	8.10 × 8.06 × 2.13 mm	0.30 × 0.19 mm	1.50 mm	Double
FE0808046D	8.13 × 8.13 × 4.64 mm	0.63 × 0.63 mm	1.46 mm	Double
FE0808037D	8.13 × 8.00 × 3.75 mm	0.63 × 0.63 mm	2.57 mm	Double
FE0908030D	9.00 × 8.00 × 3.00 mm	0.42 × 0.22 mm	2.08 mm	Double
FE0908029D	9.16 × 8.58 × 2.90 mm	0.44 × 0.25 mm	1.99 mm	Double
FE1010012D	10.00 × 10.00 × 1.25 mm	0.13 × 0.13 mm	1.11 mm	Double
FE1109040D	11.07 × 9.98 × 4.04 mm	0.71 × 0.581 mm	2.77 mm	Double
FE1110050D	11.36 × 11.36 × 5.00 mm	0.99 × 0.71 mm	3.42 mm	Double
FE1110044D	11.40 × 10.39 × 4.44 mm	0.86 × 0.57 mm	3.04 mm	Double
FE1212024D	12.00 × 12.00 × 2.48 mm	0.43 × 0.43 mm	2.77 mm	Double
FE1412056D	14.10 × 12.10 × 5.65 mm	0.50 × 0.25 mm	3.89 mm	Double
FE1515070D	15.00 × 15.00 × 7.00 mm	0.50 × 0.50 mm	4.80 mm	Double
FE1514070E	15.00 × 14.00 × 7.00 mm	0.54 × 0.29 mm	−1.40 mm	Double
FE1616042D	16.20 × 16.13 × 4.25 mm	0.60 × 0.38 mm	2.91 mm	Double
FE1616075D	16.25 × 16.00 × 7.50 mm	1.25 × 1.25 mm	5.14 mm	Double
FE1717070D	17.00 × 17.00 × 7.00 mm	1.00 × 1.00 mm	6.48 mm	Double
FE1716056D	17.20 × 16.06 × 5.65 mm	1.46 × 0.86 mm	3.87 mm	Double
FE2020025D	20.00 × 20.00 × 2.50 mm	0.25 × 0.25 mm	2.26 mm	Double
FE2019053D	20.15 × 19.80 × 5.36 mm	1.32 × 0.66 mm	3.69 mm	Double
FE2014094D	20.33 × 14.95 × 9.49 mm	1.07 × 0.61 mm	6.50 mm	Double
FE2020082D	20.50 × 20.50 × 8.25 mm	4.10 × 4.10 mm	14.00 mm	Double
FE2222076D	22.50 × 22.50 × 7.60 mm	1.25 × 1.25 mm	5.21 mm	Double
FE2424044D	24.00 × 24.00 × 4.45 mm	0.25 × 0.25 mm	3.08 mm	Double
FE2424053D	24.00 × 24.00 × 5.30 mm	0.25 × 0.25 mm	3.65 mm	Double
FE2424065D	24.01 × 24.01 × 6.50 mm	0.86 × 0.86 mm	4.63 mm	Double
FE2424065BD	24.01 × 24.01 × 6.50 mm	0.86 × 0.86 mm	4.96 mm	Double
FE2424049D	24.01 × 24.01 × 4.95 mm	0.86 × 0.86 mm	3.38 mm	Double
FE2620036D	26.51 × 20.45 × 3.69 mm	1.08 × 0.74 mm	7.09 mm	Double
FE2828065D	28.50 × 28.50 × 6.50 mm	1.50 × 1.50 mm	4.46 mm	Double
FE3030044D	30.00 × 30.00 × 4.45 mm	0.25 × 0.25 mm	3.08 mm	Double
FE3030053D	30.00 × 30.00 × 5.30 mm	0.25 × 0.25 mm	3.65 mm	Double
FE3030140D	30.00 × 30.00 × 14.00 mm	1.00 × 1.00 mm	9.59 mm	Double
FE3232080E	32.00 × 32.00 × 8.00 mm	1.00 × 1.00 mm	−0.83 mm	Double
FE3232084D	32.40 × 32.25 × 8.49 mm	1.20 × 0.75 mm	5.82 mm	Double
FE3232015D	32.50 × 32.50 × 15.00 mm	2.50 × 2.50 mm	10.28 mm	Double
FE3330085E	33.00 × 30.00 × 8.50 mm	2.30 mm	25.59 mm	Double
FE3434140D	34.00 × 34.00 × 14.00 mm	1.00 × 1.00 mm	9.59 mm	Double
FE3430082E	34.00 × 30.00 × 8.20 mm	0.75 × 0.75 mm	9.19 mm	Double
FE5050099D	50.93 × 50.62 × 9.95 mm	1.16 × 1.10 mm	6.82 mm	Double

Single-sided fly-eye models (22)

Model	L × H/Ø × T	Pitch	BFL	Optical surfaces
FE0808010S	8.00 × 8.00 × 1.00 mm	0.50 × 0.50 mm	14.98 mm	Single
FE0908010S	9.00 × 8.00 × 3.00 mm	0.48 × 0.30 mm	2.12 mm	Single
FE0908030S	9.00 × 8.80 × 3.00 mm	1.00 × 0.40 mm	9.30 mm	Single
FE1010010S	10.00 × 10.00 × 1.00 mm	0.13 × 0.13 mm	1.76 mm	Single
FE1111010S	11.00 × 10.88 × 1.00 mm	0.70 × 0.48 mm	2.33 mm	Single
FE1111010S	11.80 × 11.80 × 1.00 mm	1.73 mm	8.86 mm	Single
FE1212010S	12.00 × 12.00 × 1.00 mm	0.13 × 0.13 mm	1.76 mm	Single
FE1212010S	12.50 × 12.50 × 1.00 mm	0.40 mm	3.02 mm	Single
FE1716050S	17.10 × 16.93 × 5.00 mm	0.68 × 0.43 mm	2.74 mm	Single
FE1717010S	17.24 × 17.22 × 1.00 mm	1.51 × 0.51 mm	8.37 mm	Single
FE1817010S	18.72 × 17.05 × 1.00 mm	0.79 × 0.39 mm	2.92 mm	Single
FE2014010S	20.53 × 14.60 × 1.00 mm	1.09 × 0.60 mm	4.77 mm	Single
FE2011010S	20.70 × 11.60 × 1.00 mm	0.85 × 0.60 mm	5.70 mm	Single
FE24240010AS	24.01 × 24.01 × 1.00 mm	0.86 × 0.86 mm	5.93 mm	Single
FE24240040BS	24.01 × 24.01 × 4.00 mm	0.86 × 0.86 mm	3.60 mm	Single
FE3030010S	30.00 × 30.00 × 1.00 mm	1.00 × 1.00 mm	10.47 mm	Single
FE3232020S	32.50 × 32.50 × 2.00 mm	1.30 × 1.30 mm	17.44 mm	Single
FE4141020S	41.00 × 41.00 × 2.00 mm	4.10 × 4.10 mm	14.00 mm	Single
FE4747020S	47.00 × 47.00 × 2.00 mm	3.20 × 1.30 mm	5.81 mm	Single
FE5050020S	50.93 × 50.62 × 2.00 mm	1.12 × 1.60 mm	7.00 mm	Single
FE5252020S	52.00 × 52.00 × 2.00 mm	4.00 × 4.00 mm	16.86 mm	Single
FE0012021S	Ø12.3 × 2.15 mm	0.65 mm	1.65 mm	Single

Lens array dimensional schematic labeling pitch length height and substrate thickness — Dimensional convention: L is length, H is height, T is thickness, and pitch is lenslet spacing.

Example square illumination field paired with a microlens array — Example square illumination field produced by a lens-array optical system.

Example rectangular illumination field paired with a rectangular microlens array — Example rectangular illumination field; array geometry and optical spacing determine its aspect ratio.

Tooling and Production Route

Lampoptics' optical-lens and mold workshops can develop array tooling from the optical prescription and mechanical drawing. Molding must control every local lenslet while maintaining global pitch, array form and the mounting datum.

Lenslet size, pitch, focal tolerance, array envelope and the uniformity acceptance method are confirmed during optical and tooling review.

Fly-Eye Glass Lens Processing

Lenslet Pattern Design

Lenslet pitch, curvature, orientation and array pairing are defined around the required homogenization performance.

Array Tooling

The repeated fly-eye structure is transferred into tooling while maintaining registration across the active area.

Precision Molding

The full array is molded in glass with controlled lenslet fill, wall distribution and annealing.

Optical inspection of molded glass lenses

Uniformity Inspection

The lenslet pattern, alignment and illuminated field uniformity are checked with the intended optical arrangement.

Applications

Stage and entertainment lighting: homogenized beams and color mixing
Projection systems: uniform illumination of a spatial light modulator or image plane
Laser and LED illumination: reduction of source structure at a defined target
Inspection and machine vision: uniform fields for repeatable imaging
Optical instruments: beam integration and pupil shaping

Fly-Eye Glass Lens FAQs

Is a fly-eye lens the same as any lens array?

A fly-eye lens is a lens array specifically used to divide and homogenize an illumination field.

Does the system need two arrays?

Many homogenizers use a matched pair, but some systems combine one array with other condenser optics. The configuration is defined by the optical design.

Which dimensions affect uniformity?

Lenslet pitch, aperture, focal length, array spacing, source size and target distance all affect the result.

Can Lampoptics make custom fly-eye arrays?

Lampoptics produces stage-light fly-eye glass. Custom pitch, lenslet profile and array envelope are reviewed against the supplied optical design.

How should uniformity be approved?

Define the source, drive condition, target plane, field size, sampling grid and numerical uniformity limit.