China Top Object Space Telecentric Lens Manufacturers

China has become an important sourcing center for precision machine-vision optics. Its manufacturers serve electronics, packaging, automotive, semiconductor, and laboratory inspection markets. The search term “object space telecentric len” often refers to an object-space telecentric lens. This lens keeps magnification stable when object distance changes slightly. It also reduces perspective errors at the image edge.

A reliable manufacturer should provide more than catalog specifications. Buyers need measured telecentricity, distortion data, working distance, resolution, and compatible sensor details. Ask how each lens is tested. Look for clear inspection records, calibration methods, and traceable quality procedures. A useful evaluation may include imaging a metal reference plate under controlled lighting. Small dimensional changes should remain consistent across the field of view. That detail matters.

Experience is visible in practical design choices. A supplier may offer coaxial illumination, adjustable apertures, modular mounts, or custom flange options. These features can simplify integration around a crowded production line. However, product pages are not enough evidence. Some specifications may appear impressive but lack test conditions. That is where comparison becomes difficult.

This guide introduces leading China object-space telecentric lens manufacturers and their typical strengths. It considers optical performance, customization ability, manufacturing experience, communication, and after-sales support. Company rankings should not be treated as permanent. Real project results can differ. Samples, drawings, and application tests remain essential before purchase. A careful choice begins with the measurement problem, not the lowest quotation.

Table of Contents [Hide]

1 Object-Space Telecentric Lenses: Definition and ≤0.1° Telecentricity

2 Core Specifications: 0.1×–10× Magnification, Working Distance, and MTF

3 Leading Chinese Manufacturers: Product Lines, ISO 9001, and Export Markets

4 Supplier Comparison: Field of View, Aperture, Resolution, and <0.1% Distortion

5 Industrial Applications: Metrology, Wafer Inspection, and 5–20 µm Accuracy

Object-Space Telecentric Lenses: Definition and ≤0.1° Telecentricity

Object-Space Telecentric Lenses: Definition and ≤0.1° Telecentricity

An object-space telecentric lens keeps chief rays nearly parallel before they reach the sensor. This geometry reduces magnification changes caused by object height. A machined pin stays visually consistent, even when its position shifts slightly along the optical axis. Telecentricity of ≤0.1° means the chief-ray angle remains within one tenth of a degree. That is a demanding measurement condition.

In production, engineers use these lenses for dimensional inspection, edge detection, and semiconductor component measurement. A narrow field of view, stable lighting, and rigid mounting remain essential. The lens cannot correct poor fixturing. Small alignment errors still matter. The 2024 MarketsandMarkets Machine Vision Market report estimates growth from approximately USD 16.9 billion in 2024 to USD 25.4 billion by 2029. This expansion reflects rising demand for repeatable automated inspection, where optical uncertainty directly affects yield decisions.

When comparing China-based manufacturers, buyers should request measured telecentricity curves, not only nominal specifications. Ask how the angle was tested, at which working distance, and across what image field. The Global Machine Vision Market report by Grand View Research identifies metrology and quality inspection as important application areas. Yet reported figures can differ between laboratories. That deserves attention. A ≤0.1° claim may describe the optical center only, rather than the full usable field. Practical verification should include calibrated targets, temperature checks, and repeated measurements at several object heights.

China Top Object Space Telecentric Lens Manufacturers - Object-Space Telecentric Lenses: Definition and ≤0.1° Telecentricity

Technical Dimension	Typical Specification or Requirement	Definition and Practical Significance
Lens Type	Object-space telecentric lens	A lens designed so that the chief rays are parallel, or nearly parallel, in object space. This helps maintain consistent feature size when object position changes along the optical axis.
Object-Space Telecentricity	≤ 0.1°	The maximum chief-ray angle relative to the optical axis on the object side. A value of 0.1° corresponds to approximately 1.75 mrad and indicates high angular uniformity.
Measurement Accuracy Benefit	Low perspective error	Object dimensions are less affected by moderate height or position variations, making the design suitable for dimensional inspection, metrology, gauging, and automated optical inspection.
Magnification	Fixed magnification; commonly selected from approximately 0.1× to 1.0×	Telecentric lenses are generally optimized for a defined magnification. The correct value depends on the object field of view and the camera sensor size.
Working Distance	Fixed distance, often approximately 65–200 mm in machine-vision designs	The distance from the front optical reference to the object plane. A fixed working distance supports repeatable lighting, fixturing, and inspection geometry.
Field of View	Specified at a particular magnification and sensor format	The visible object area is determined by sensor dimensions divided by magnification. For example, a 12 mm sensor dimension at 0.5× magnification gives an approximate 24 mm object-space field in that direction.
Distortion	Typically specified below 0.1% for precision inspection designs	Low distortion reduces geometric deviation between the object and its image. The actual value must be verified across the usable image field.
Depth of Field	Application-dependent; commonly increased by stopping down the aperture	Depth of field depends on magnification, numerical aperture, acceptable image blur, illumination, and sensor pixel size. A telecentric layout does not eliminate focus limitations.
Numerical Aperture	Selected according to resolution, light level, and depth-of-field requirements	Higher numerical aperture can improve resolving power and light collection, but it generally reduces depth of field and may increase sensitivity to alignment.
Sensor Compatibility	Must match the camera sensor format and image circle	Common industrial sensor formats include 1/1.8-inch, 2/3-inch, 1-inch, 4/3-inch, and larger. The lens image circle should cover the sensor without mechanical or optical vignetting.
Wavelength Range	Often designed for visible wavelengths around 400–700 nm	For ultraviolet, near-infrared, or multispectral inspection, coatings, glass selection, focus shift, and telecentric performance should be specified for the required wavelength band.
Aperture Control	Manual or fixed iris; application-specific f-number	Stopping down can improve depth of field and reduce some aberrations, while excessive stopping may introduce diffraction and lower fine-detail contrast.
Mounting Interface	Common machine-vision interfaces include C-mount and larger industrial mounts	The mount must provide adequate thread compatibility, flange distance, mechanical stability, and clearance for the selected camera and lighting system.
Calibration Requirement	Recommended for precision measurement applications	A calibrated target can be used to verify scale, distortion, image-center alignment, and repeatability after the lens, camera, lighting, and working distance are installed.
Typical Applications	Dimensional inspection, edge measurement, semiconductor and electronics inspection, pharmaceutical packaging, and precision gauging	The main advantage is stable image scale with reduced perspective error, especially when parts have height variation or must be measured across a broad field.

Note: Specifications shown as typical ranges or design requirements are application-dependent. Final telecentricity, distortion, resolution, working distance, and field-of-view values should be confirmed from the manufacturer’s optical test report for the selected lens configuration.

Core Specifications: 0.1×–10× Magnification, Working Distance, and MTF

China Top Object Space Telecentric Lens Manufacturers

A 2024 MarketsandMarkets report estimates the machine vision market will grow from about US$14.7 billion in 2024. This growth increases demand for stable telecentric imaging. Magnification must match the inspection field, not the catalog headline. A 0.1× lens suits larger parts and wider fields. A 10× lens reveals tiny edges, but it usually needs a shorter working distance and stronger illumination.

Working distance is a production variable. It affects access, lighting angles, and mechanical safety. Many Chinese optical manufacturers specify distance from the front lens surface. Others use the principal plane. Confirm the reference point before comparing quotations. A small measurement error matters.

MTF deserves closer attention. Use MTF curves at the sensor’s actual wavelength and spatial frequency. A lens may show excellent center resolution while losing contrast near the image edge. EMVA 1288 provides a recognized framework for measuring imaging performance, noise, and sensitivity. Ask for measured data, not only calculated curves. Real assemblies include tolerances, temperature drift, and alignment errors.

Do not overtrust a wide magnification range. It can hide compromises. For 0.1×–10× applications, compare distortion, telecentricity error, aperture, sensor format, and working-distance stability. I would also request sample images from the intended material. Polished metal, transparent plastic, and dark rubber expose different weaknesses. This step is slower, but often more honest.

Leading Chinese Manufacturers: Product Lines, ISO 9001, and Export Markets

China Top object space telecentric lens Manufacturers

Chinese manufacturers of object-space telecentric lenses increasingly serve precision inspection, robotics, semiconductor assembly, and metrology projects. Their product lines often include fixed-magnification lenses, bilateral telecentric designs, coaxial illumination systems, and custom mounts. Some suppliers also provide matching cameras, light sources, and calibration accessories.

ISO 9001 certification can indicate controlled production procedures, traceability, and documented inspection. However, a certificate alone does not prove optical performance. Buyers should request measured telecentricity, distortion, resolution, working distance, and depth of field. Practical evaluation matters. Ask for test images of small machined parts, connector pins, or printed circuit features. Export-focused manufacturers commonly support markets in Europe, North America, Southeast Asia, and the Middle East. They should provide clear packing standards, technical drawings, and responsive communication across time zones.

Tips: Confirm the exact magnification range before ordering. Check whether the stated working distance includes protective glass or lighting modules. Request sample data, calibration records, and installation guidance. A pre-shipment inspection may prevent costly alignment problems.

Some catalogs look impressive. Yet specifications can remain incomplete. This is where careful comparison helps. Manufacturers with engineering teams can adjust apertures, interfaces, and lighting layouts for unusual inspection systems. Still, customization may extend delivery times and increase testing requirements. Buyers should balance optical precision, export experience, documentation quality, and after-sales support rather than choosing only by price.

China Top Object-Space Telecentric Lens Manufacturers: Product Lines, ISO 9001, and Export Markets

Reference wavelength ranges commonly associated with machine-vision optical product lines

Object-space telecentric lenses are commonly configured for precision measurement, dimensional inspection, semiconductor inspection, and automated quality control. The wavelength ranges shown are standard optical-band references rather than company-level sales or market-share data. ISO 9001 refers to a quality-management-system standard; certification is issued by independent certification bodies, not by ISO. Chinese optical manufacturers commonly serve domestic and international machine-vision markets across East Asia, Europe, North America, and other industrial regions.

Supplier Comparison: Field of View, Aperture, Resolution, and <0.1% Distortion

China Top Object Space Telecentric Lens Manufacturers

When comparing object-space telecentric lens suppliers, field of view should match the inspected part, not only the camera sensor. A 20 × 15 mm field may suit a small connector, while a wider field can reduce sampling detail. Ask for the usable field, working distance, and telecentricity tolerance. These values affect edge measurements.

Aperture influences light collection, depth of field, and image contrast. An f/8 lens may provide stable inspection results, but it usually needs stronger illumination. Resolution should be checked through MTF charts and practical test images. A supplier claiming 3 μm resolution should show the target, camera, lighting, and test distance. Otherwise, the number remains difficult to trust. Small details matter.

Distortion below 0.1% sounds impressive, yet test conditions can change the result. Request calibration data across the full field, especially near the corners. Compare repeated measurements, not one attractive sample. Experienced manufacturers should explain tolerances, coating options, alignment controls, and inspection records. A clear datasheet helps, but it is not proof. I would also test temperature stability and vibration response before approval. The comparison is rarely perfect. Some suppliers provide excellent center sharpness but weaker corners. Others meet distortion targets only with a narrower aperture. An honest evaluation should record these compromises beside price and delivery time.

Industrial Applications: Metrology, Wafer Inspection, and 5–20 µm Accuracy

China Top Object Space Telecentric Lens Manufacturers

Object-space telecentric lenses are valuable when dimensional accuracy matters more than visual appeal. In metrology, they reduce perspective error across the measured field. A 5 mm feature should not appear smaller near the image edge. This stability supports gauges, machined parts, connectors, and precision assemblies.

Wafer inspection presents stricter conditions. Surface patterns can be tiny, reflective, and densely arranged. A telecentric lens helps maintain consistent magnification while a camera scans the wafer. Low distortion is essential for comparing die positions and detecting edge defects. However, the lens cannot create 5–20 µm accuracy alone. Calibration targets, lighting, sensor resolution, vibration control, and thermal stability also influence the result.

Experienced Chinese manufacturers usually discuss working distance, field of view, numerical aperture, and telecentricity before suggesting a lens. That is a useful sign of engineering discipline. Ask for distortion data across the full image circle, not only center measurements. Request test images with your actual material and illumination. Small mounting errors can become large measurement errors. I have seen optical specifications look excellent on paper, yet the installed system performed poorly. The assumption was convenient, but incomplete. A practical evaluation should include repeatability, edge contrast, focus tolerance, and calibration records under factory conditions.