Q1: What is the VT-TLL-23 liquid telecentric lens used for?
A: It is designed for precision machine vision, metrology, semiconductor inspection, and automated optical inspection (AOI) requiring flexible focusing and high measurement accuracy.
Q2: What is the advantage of liquid lens technology?
A: The liquid lens enables electronic focusing, allowing fast and stable working distance adjustment without mechanical movement while maintaining telecentric performance.
Q3: Does the lens maintain telecentricity during focus adjustment?
A: Yes. The lens maintains consistent telecentric imaging, low distortion, and stable magnification across the entire focusing range.
Q4: What magnification range does this lens support?
A: The VT-TLL-23 supports a wide magnification range from 0.4X to 4.0X, making it suitable for various inspection and measurement tasks.
Q5: What is the sensor format and mount type?
A: It is designed for 2/3" sensors with C-Mount compatibility, widely used in industrial machine vision cameras.
Q6: What is the optical performance of this lens?
A: The lens achieves MTF > 0.3 at 100 lp/mm, ensuring high-resolution imaging and accurate edge detection.
Q7: Is a coaxial illumination version available?
A: Yes, an optional coaxial illumination version is available for reflective surfaces such as metal, glass, and polished components.
Q8: What industries commonly use this lens?
A: It is widely used in semiconductor inspection, PCB inspection, electronics manufacturing, precision assembly, and industrial automation.
Estimated Delivery Time
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Shipping dates are estimates and subject to change. By ordering, you accept possible schedule adjustments. For urgent orders, please confirm with us before purchasing. Post-order cancellations are subject to a 6.4% handling fee.
Description
Product Description
Liquid Telecentric Lens with Electronic Focus for High-Precision Machine Vision
The VT-TLL-23 Series is a 2/3" C-Mount liquid telecentric lens designed for precision machine vision, metrology, and automated inspection. By integrating liquid lens technology, it enables fast electronic focusing and an extended depth of field while maintaining telecentric imaging performance across the entire focus range.
Available in magnifications from 0.4X to 4.0X, the VT-TLL-23 Series delivers high optical resolution with MTF >0.3 @100 lp/mm, ensuring excellent image sharpness for precision measurement and defect inspection. An optional coaxial illumination version is available for reflective surfaces and demanding inspection applications.
Unlike conventional telecentric lenses that require mechanical refocusing, the liquid lens design enables rapid, repeatable working distance adjustment without compromising magnification, telecentricity, or image quality.
Key Features
✔ Liquid Lens Technology
Electronic focusing enables fast, precise, and maintenance-free focus adjustment.
✔ Extended Depth of Field
Maintains sharp imaging over a larger focus range, improving inspection efficiency.
✔ 2/3" C-Mount Compatibility
Optimized for industrial cameras with up to 2/3" image sensors.
✔ Magnification from 0.4X to 4.0X
Supports a wide range of machine vision and precision measurement applications.
✔ High Optical Resolution
MTF >0.3 @100 lp/mm for accurate edge detection and fine-detail imaging.
✔ Optional Coaxial Illumination Version
Ideal for reflective, polished, and metallic surfaces.
Ideal Applications
- Precision Metrology
- Semiconductor Inspection
- PCB Inspection
- Electronics Manufacturing
- AOI (Automated Optical Inspection)
- Precision Assembly
- Robotics & Machine Vision
- Surface Defect Inspection
Specifications
2/3" Liquid Telecentric Lens
| Model | Coaxial | Mag. | WD+Liquid | DOF | F/# | MTF (lp/mm) |
|---|---|---|---|---|---|---|
| VT-TLL04-23 | No | 0.4x | 100-120mm | ±1.8mm | 6.5 | >0.3@100 |
| VT-TLL05-23-A | No | 0.5x | 110-120mm | ±1.8mm | 10 | >0.3@100 |
| VT-TLL05-23-C | No | 0.5x | 100-120mm | ±1.8mm | 10 | >0.3@100 |
| VT-TLL17-23 | No | 1.75x | 100-120mm | ±0.2mm | 13 | >0.2@60 |
| VT-TLL40-C-23-A | Yes | 4.0x | 64.7mm | 2mm | 17 | >0.3@50 |
| VT-TLL40-C-23-C | Yes | 4.0x | 62.778mm | 2mm | 17 | >0.3@50 |
| VT-TLL40-23 | No | 4.0x | / | 2mm | 17 | >0.3@50 |
Return and Exchange Policy
Please review our return and exchange policy carefully before placing your order. We encourage all customers to confirm product specifications and application requirements before purchase.
1. Return and Exchange Eligibility
Contrastech accepts return or exchange requests only for product defects or quality issues, subject to review and confirmation.
Returns or exchanges for reasons unrelated to product defects or quality issues are generally not accepted, subject to applicable law.
2. Non-Eligible Return and Exchange Requests
Before placing an order, customers are responsible for confirming that the selected product meets their technical requirements and is suitable for their intended application. Customers are also responsible for evaluating product compatibility with their systems and use cases.
Requests based on the following reasons are generally not eligible:
- Misunderstanding product specifications or selecting the wrong product.
- Product incompatibility with the customer's intended application.
- Personal dissatisfaction unrelated to a confirmed product defect or quality issue.
These limitations are subject to any mandatory rights or remedies available under applicable law.
3. Product Quality and Claim Period
Our products undergo quality control and quality assurance inspections before shipment. However, if a product you receive is damaged, defective, or materially inconsistent with its published description, please contact us within 3 business days of receipt to report the issue.
Important: Please provide your order number, a description of the issue, and relevant photos or videos where available. This information helps our team assess your claim efficiently.
Our team will review the information provided and advise you on the next steps. Please do not return any product before receiving return instructions from our team.
The stated reporting period does not limit any non-waivable rights you may have under applicable law.
4. Refund Processing and Transaction Fees
For return or refund requests that meet our eligibility requirements, we will process the refund within 1 business day after approval.
Please note that a 6.4% transaction processing fee charged by the payment platform is non-refundable and may be deducted from the refund amount, where permitted by applicable law and the relevant payment provider's terms.
The actual time required for the refunded amount to appear in your account may vary depending on your payment provider or bank.
Need Assistance?
If you have questions about our return and exchange policy or need to report a product quality issue, please contact our team.
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