Category: Lenses

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Learn about FUJI’s HF-XA-5M (5 Megapixel) lens series which resolves 3.45um pixel pitch sensors! Perfect for cameras with Sony Pregius image sensors.

 

FUJINON has continued to expand its HF-XA-5M product line with the new 5 MegaPixel lens (MP) series.

These lenses provide the resolving power required for the popular Sony Pregius Image sensors with 2/3″ formats and 3.45um pixel pitch.  

For any cameras using the Sony Pregius 5 MP IMX264 and IMX250 sensors, these are a perfect match for the pixel pitch.  Even older   Sony ICX625 sensors will benefit from the new HF-XA-5M lenses.  




FUJI HF-XA-5M Unique Features  


Compact design for installation versatility

The FUJINON HF6XA-5M, with a focal length of 6mm measures just 39mm in external diameter, the world’s smallest machine vision lenses of this class. The other five models are also compactly designed with the external diameter of 29.5mm, which is about the same size as general compact machine vision cameras. The entire series contributes to achieving a compact form factor for machine vision systems
 
Advanced Optical performance 

FUJI’s unique “4D” High Resolution performance delivers edge to edge sharpness under a range of installation conditions

Delivering high resolution of 3.45 µm pixel pitch on a 2/3-inch sensor at the working distance of 50cm, which is the most frequently-used distance among users.
The unique “4D High Resolution” function mitigates resolution degradation when changing a working distance or aperture value. It maintains their high resolving power of no less than 4.4 µm pixel pitch (equivalent to 3 megapixels) on a 2/3-inch sensor from the image center to all corners. This function perfectly matches when you want to set the aperture wide open to achieve a faster shutter speed.
 
 
Designed for installation convenience
 
Three screw holes each are provided on the iris ring (aperture) and the focus ring. Users can choose the optimum hole according to their installation conditions, providing a high level of installation convenience.
 



 
 
 
 
 
  
Please do not hesitate to Contact us to discuss your application and help select a lens.    1st Vision can provide a complete solution including cameras, lenses, lighting and cables.  We have over 100 years of combined experience we can put to work for you.  

Ph:  978-474-0044
info@1stvision.com
www.1stvision.com  
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New High Resolution 1.1” Lenses are a perfect fit for the new Sony 1.1” 12 MP Sensor cameras

Sony’s Pregius image sensor line has continued to expand to higher resolutions and sizes.

The latest 12 megapixel, Pregius IMX304 sensor has a 3.45um pixel pitch which requires a 1.1″ lens to prevent vignetting.

 In order to obtain optimal contrast within an image using this sensor,  a lens supporting at least 145 line pairs / mm must be used.

 


The lenses are optimized for down to 3.1um pixel pitch images.  Use of state of the art optical technology enables high contrast and high resolution from the center to edges of the lens, despite the large lens aperture.   

Examples below






The image to the left demonstrates improper pairing of a lens without enough performance to adequately resolve the size of the pixels on the camera.  Zooming into the given areas shows lack of contrast

 

 

The image to the right demonstrates the performance of the Tamron 1.1″ lens on the new 12MP, 3.45um pixel pitch image sensors.  Zooming into the given areas show high contrast in the center and edges of the lens.




Alternative solutions prior to now would be to use a 4/3″ or F-mount lens which are very expensive.  If a 1″ format was used, you will have vignetting on 5% of the edges of the lens. This lens is the best solution for the larger 1.1″ sensors!

Key Features include

  • Compatible up to 1.1″ C-mount cameras:  Compatible with image sensors up to 1.1″ formats and image circle diameters of 17.4mm (effective image circle diameter to 17.6mm).  
  • Industrial leading high contrast and resolution:  Compatible with 3.1um pixel pitch image sensors, up to 1.1″ sensors.  Perfect for Sony Pregius IMX304, 12 megapixel sensors.
  • Lens designed for High-Fidelity imaging:  Uniform high contrast and resolution from the corners to the center despite the large aperture size.  Provides 160 lp/mm in the centers.  
  • Combination of advanced coating technology:  Integration of advanced techniques such as broad band anti-reflection coatings are used, additionally allowing for high image quality at close distances. 
  • Enhanced Functionality and Utility:  Well tuned rotation torque of both focus and iris control rings facilities smooth adjustments.  Lock mechanisms on the rings can be positioned at a choice of tree lock positions.   

 

 

Interested in cameras using the new 
Sony Pregius IMX304 12 Megapixel image sensor?  


A list of current cameras with this sensor are below: 

Allied Vision cameras
Manta G-1236 – GigE, 4112 x 3008, 9.7 fps, 

Teledyne Dalsa cameras
Genie Nano M4020 / C4020  (Coming soon!)

 

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How to solve the dilemma of imaging small pixels in the newest image sensors? See the new FUJI HF-12M lenses!

The Sony Pregius image sensors are becoming the workhorse in industrial cameras providing various resolutions, coupled with high dynamic range and unsurpassed sensitivity.  However, the latest pixel architecture from Sony has moved to a 3.45um pixel pitch which results in more demand on the lens resolution.  It becomes even more challenging on high megapixel and small format image sensors such as the ON-SEMI MT9P031 or AR1820HS which have 2.2um and 1.25um respectively.

To be successful in imaging with these sensors, a lens design must provide the ability to resolve the small pixels ideally to the edge of the lens or image contrast will degrade.  In many cases, this is stated in terms of line pairs per mm (lp/mm) from center to edge (i.e 120/100).  Read more about lens specifications in our “Demystifying Lens performance specificaions” blog

How do we overcome this problem to ensure a high contrast image?   
FUJI 12 Megapixel HF-12M series lenses!

Although lens manufacturers tout a lens series in Megapixels, the key is understanding the lens performance data in terms of its resolution.  The FUJI HF12M series states “12 Megapixels”, but really is a lens designed to resolve 2.1um pixels on a 2/3″ sensor which accommodates 12 megapixels.  The bottom line is that any image sensor with small pixels down to 2.1um regardless of resolution benefit from this lens.. This lens will help resolve the pixel!  

The HF-12M series is great for cameras using image sensors from Sony’s Pregius IMX Series (ie  IMX250, IMX252, IMX264) which have 3.45 um pixels along with ON-Semiconductors MT9P031 or AR1820HS sensors.  


FUJI HF-12M Features  

Advanced Optical performance 

  • When the iris (aperture) is set at the orange F4 marker on  the lens barrel, the HF-12M series delivers the resolving power greater than 2.1um pixel pitch.
  • The HF-12M series is capable of maintaining ultra-high definition with a 2.7um pixel pitch within the whole frame area.  
  • The series brings out maximum performance of the popular Sony Pregius image sensors with a 3.45um pixel pitch.


Unique “4D” High Resolution performance
General machine vision lenses share the issue of resolution degradation when the working distance or aperture is changed.  The HF-12M features Fujinon lenses unique “4D High Resolution” performance.  It maintains a high level of consistent image sharpness at the center as well as the edges, while mitigating resolution degradation that typically occurs when changing a working distance or aperture value.  




Ease of installation and high reliability

  • Compact form factor across five models with 33mm diameter
  • Most lenses use iris and focus locking screws with protruding heads causing interference.  The HF-12M series come with regular as well as headless compact screws to minimize interference
  • Built with metal barrel for durability and robustness.




Industry-leading low distortion design of no more than 0.05%
Unique optical design minimizes troublesome distortion.  The series boasts an industry-leading low distortion rate of not more than 0.05%

 
 

 

 

See the entire Fujinon lens line HERE!   


  

1st Vision has extensive knowledge in industrial imaging and can help answer any questions.  We have over 100 years of combined knowledge and look forward to discussing your application.  

Please do not hesitate to Contact us!  1st Vision can provide a complete solution including cameras, lenses, lighting and cables.  

Ph:  978-474-0044
info@1stvision.com
www.1stvision.com  

Follow us on Social Media!

    https://www.facebook.com/pages/1st-Vision/944658058935262?fref=ts           

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Advantages of Telecentric lenses in machine vision applications

Telecentric lenses are essential in eliminating distortion errors caused by standard lenses in machine vision applications.  


Telecentric lenses are defined by lenses only accepting incoming light ray bundles whose principal rays are parallel to the optical axis of the lens as seen in the diagram below

 




















Key advantages to a Telecentric lens are constant magnification, no perspective error and very low distortion

 









 



How do the advantages of telecentric lenses help in machine vision applications?  

Constant Magnification

Telecentric lenses can provide constant magnification, and not influenced by varying lens to object distances.  



Example: The image to the right shows 2 screws in which the 2nd screw is 10mm further away from screw 1 when viewed from the Telecentric lens in the setup.












Using a standard lens, screw #1 which is closer will appear to be larger














Using a Telecentric lens, the screws look the same size and not influenced by the lens to object distance.  

This is very helpful in applications to ensure accurate measurements negating any deviations from part placement.

Perspective Error

Standard lenses show significant perspective errors, whereas telecentric lenses are able to eliminate any perspective effects.  In cases where measurements are critical, using a telecentric lens is a must!




Low Distortion

Regular lenses have 1-2% distortion, whereas telecentric lenses have 0.1%





Regular lens will either have “Barrel” (left image) or “Pin cusion” distortion (right image) 






    Barrel Distortion                   Pin Cushion Distortion

In barrel distortion, image magnification decreases with distance from the optical axis. This is common in fish-eye lenses.  

In pincushion distortion, image magnification increases with the distance from the optical axis.  

Using telecentric lenses in machine vision applications will eliminate barrel and pin cusion distortion.  Low distortion is imperative where accuracy is required.  

How can it get any better!  – Use Collimated light!

Telecentric lenses provide a high level of accuracy, but when coupled with a collimated light source, edge definition is increased.

Diffused backlights can generate unwanted border effects and create a “fake” image of the edge of a part.  Collimated backlights allow only parallel rays to pass by objects.  This setup would be setup like the diagram below.  

   
The result is very crisp edge definition as seen in the images below.  The left image is using a standard backlight in which light “wraps” around the cap.  The right images use a collimated back light providing excellent edge definition.










 

Images courteously of Opto Engineering!1st Vision has extensive knowledge in industrial imaging and can help answer any questions.  We have over 100 years of combined knowledge and look forward to discussing your application.  Please do not hesitate to Contact us!  1st Vision can provide a complete solution including cameras, lenses, lighting and cables.  

Ph:  978-474-0044
info@1stvision.com
www.1stvision.com  

Follow us on Social Media!

    https://www.facebook.com/pages/1st-Vision/944658058935262?fref=ts