Imaging Lens Assembly for 3D Optical Sensors

Product Specifications

Technical details and manufacturing context for Imaging Lens Assembly

Definition

The Imaging Lens Assembly is a precision optical component used within a 3D Optical Sensor Head. Its primary function is to collect incoming light from the target scene, correct optical aberrations, and focus the light accurately onto the image sensor. This assembly is critical for determining the resolution, field of view, and depth accuracy of the 3D measurement system. The assembly consists of multiple lens elements arranged to manipulate light rays, converging them onto the sensor plane to form a sharp image. Different lens elements correct for chromatic aberration, spherical aberration, and distortion to ensure high-fidelity image capture for subsequent 3D processing algorithms. The assembly is typically constructed with optical glass lenses and an aluminum alloy housing, providing mechanical stability and thermal performance. Key parameters include focal length (4–12 mm), aperture (F-number 1.4–2.8), optical distortion (<1.5%), modulation transfer function (>0.3 @ 50 lp/mm), back focal length (5–15 mm), operating temperature (-20 to 70 °C), storage temperature (-40 to 85 °C), relative humidity (20–80% RH, non-condensing), ingress protection rating (IP50–IP65 per IEC 60529), lens material (glass), weight (10–50 g), and dimensions (Ø20–30 mm × 15–25 mm). These values are reference ranges and must be verified for the specific model and application. The assembly is designed to integrate with the sensor package and camera housing, and its performance directly impacts the accuracy of 3D measurements. Proper selection requires consideration of the sensor size, working distance, and environmental conditions. Verification of model-specific values and standards should be conducted with the legal manufacturer or supplier.

Working Principle

The assembly uses multiple lens elements to collect and focus light from the object onto the sensor plane. The lenses are arranged to converge light rays, forming a sharp image. Aberrations such as chromatic and spherical aberration are corrected by the lens design, and distortion is minimized to ensure accurate 3D mapping. The aperture controls light throughput and depth of field, while the focal length determines field of view and magnification. The back focal length must match the sensor package height. The assembly operates within specified temperature and humidity ranges to maintain focus and image quality.

Common Materials

Optical Glass, Aluminum Alloy

Technical Parameters

Parameter	Typical range	Notes & selection driver
Focal Length	4–12 mm	Determines field of view and magnification.
Aperture (F-number)	1.4–2.8	Affects light throughput and depth of field.
Optical Distortion	<1.5 %	Lower distortion for accurate 3D mapping.
Modulation Transfer Function (MTF)	>0.3 @ 50 lp/mm	Indicates resolution and contrast.
Back Focal Length	5–15 mm	Must match sensor package height.
Operating Temperature	-20–70 °C	Outside range may cause focus shift.
Storage Temperature	-40–85 °C	Survival range for shipping and storage.
Relative Humidity	20–80 %RH	Non-condensing; condensation may cause fogging.
Ingress Protection (IP) Rating	IP50–IP65	Higher rating for dusty/humid environments.IEC 60529
Lens Material	Glass	Glass for thermal stability; plastic for cost.
Weight	10–50 g	Affects mounting and moving parts.
Dimensions (Diameter × Length)	Ø20–30 × 15–25 mm	Must fit within camera housing.

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Lens Elements Part
Refract and focus light rays; individual elements correct for specific optical aberrations.

Material: Optical Glass (e.g., BK7, SF11)
Lens Barrel
Holds all lens elements in precise alignment and provides mechanical mounting to the sensor head.

Material: Aluminum Alloy or Engineering Plastic
Mounting Flange Part
Provides the standardized interface (e.g., C-mount, S-mount) for attaching the assembly to the 3D sensor housing.

Material: Stainless Steel
Aperture
Sets how much light gets through and how deep the focus stays.

Applied To / Applications

This component is essential for the following industrial systems and equipment:

3D Optical Sensor Head

View system integration details

Manufacturers of Imaging Lens Assembly

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Frequently Asked Questions

What is the primary function of the imaging lens assembly?

It collects light from the target scene, corrects optical aberrations, and focuses it accurately onto the image sensor, which is essential for determining resolution, field of view, and depth accuracy in 3D measurement systems.

What materials are typically used in this assembly?

The assembly commonly uses optical glass for the lens elements and aluminum alloy for the housing, providing optical clarity and mechanical stability.

How does the focal length affect the 3D system?

Focal length determines the field of view and magnification. A shorter focal length provides a wider field of view, while a longer one offers higher magnification, affecting the measurement range and resolution.

Why is the ingress protection rating important?

The IP rating indicates the level of protection against dust and moisture. A higher rating (e.g., IP65) is suitable for dusty or humid environments, ensuring reliable operation and preventing fogging or damage.

Data Basis

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Preliminary Technical Classification

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pressure:	0 to 1 atm (sealed assembly)
other spec:	Max humidity: 85% RH non-condensing
temperature:	-20°C to +80°C

Imaging Lens Assembly

Product Specifications

Applied To / Applications

Industrial Ecosystem & Supply Chain Structure

Application Fit & Sizing Matrix

Reliability & Engineering Risk Analysis

Compliance & Manufacturing Standards