SINE Sinusoidal Single Frequency Gratings

Our SINE Sinusoidal Single Frequency transmittance patterns have proved to be very useful for specialized MTF Measurement as well as for such applications as moirè contouring. They are made on film base material with a nominal thickness of 0.175mm. This material is polyester and tends to be somewhat birefringent. The harmonic modulation values are generally 3% or less.

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SINE (Sinusoidal) Targets & Arrays

Applied Image, Inc.

Sinusoidal Target Arrays have been recognized as a superior test method for a variety of applications, from moiré contouring to reliable MTF Evaluation of materials, lenses, cameras, and electro-optical systems (Follow the hyperlink to learn about using Sinusoids for MTF eval). Sinusoidal Pattern Arrays are manufactured on two different materials for both reflective and transmissive applications. Because of the inherent limitations of reflective materials, the maximum spatial frequency of the reflective pattern arrays is limited to 20 cycles per mm, while the transmission film arrays are offered in various sizes up to 256 cycles per mm. In addition, the sinusoidal arrays are available in a Single Frequency Grating or with Multi-Frequency Gratings. If instead of continuous sinusoidal frequency, you are looking for a square wave frequency design, then look to the Ronchi Gratings page. Should you need to alter the size of the pattern or the substrate, fill out our Custom Test Targets and Charts form and start the conversation.

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SINE FBI Charts

Applied Image, Inc.

There are two SINE Sinusoidal arrays designed for FBI applications: the SINE M-13-60-S-RM and the SINE M-13-60-FBI Kit.The SINE M-13-60-S-RM was designed jointly by the Federal Bureau of Investigation, of Washington DC, and MITRE, of Bedford MA. The primary function of this Target is for computing Modulation Transfer Function (MTF) evaluation in live scanner fingerprint systems for conformance to Integrated Automated Fingerprint Identification Systems (AFIS) image quality requirements. The array is on reflective material measuring 16mm x 16mm with sinusoidal arrays ranging in frequency from 1.0 to 10.0 cycles per mm; with nominal modulation of the sinusoidal areas at 60%. The top and bottom rows are density scales, from 0.20 to 1.20 densities.The SINE M-13-60-FBI Kit consist of two individual components, the SINE M-13-60-1X-RM and the RR1-N-RM Ronchi Ruling grating.

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SINE M-13-60 Sinusoidal Array

Applied Image, Inc.

The Sinusoidal Array SINE M-13-60 is designed to be used for evaluating systems that work in the reflective mode such as scanners, machine vision systems and cameras. It is imaged on Photo Paper in four different sizes getting larger from 1X – 8X. The ½X and 1X slides incorporate the same spatial frequencies. Spatial frequencies for the 2X, 4X and 8X versions are 1/2, 1/4 and 1/8 respectively.

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SINE M-14 Sinusoidal Array

Applied Image, Inc.

The Sinusoidal Array SINE M-14 was designed for various electro-optical applications, particularly where a small array is needed to fit into the frame. It can fit into an 18mm diameter circle or into a standard 35mm motion picture frame.The lines in the SINE M-14 lie perpendicular to the length of the film. In addition, the pattern is available on a wider film (without perforations) cemented between glass (TM-G options) both the .6 (-60) and .8 (-80) modulations.

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SINE M-15-60 Sinusoidal Array

Applied Image, Inc.

The reflective Sinusoidal Array SINE M-15-60 is similar to the M-13-60 (1X version) except that the range of spatial frequencies begins with 0.25 cycles per mm and extends to 20 cycles per mm. To compensate for the additional frequencies, the 3/16 cycles per mm area has been eliminated. Both arrays are imaged on Photo Paper.

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SINE M-19 Sinusoidal Array

Applied Image, Inc.

The Sinusoidal Array SINE M-19 is a remarkable new test array that achieves 256 cycles per mm while maintaining a significant modulation. It is designed for testing high resolution optical systems such as microscopes. Because its maximum width is 7.5mm, the SINE M-19 is small enough to fit easily onto a standard microscope slide (the TM-G variation is mounted in glass).

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SINE M-5 Sinusoidal Array

Applied Image, Inc.

The Sinusoidal Array SINE M-5 is made on a strip of 70mm film approximately 5.12 inches (130mm) in length.The upper row contains the sinusoidal areas with the spatial frequencies in cycles per mm. All sinusoidal areas are carefully oriented with respect to the others, and the lines at the left end of the array have been added for alignment purposes.

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SINE M-6 Sinusoidal Array

Applied Image, Inc.

The Sinusoidal Array SINE M-6 contains the same gray scales and sinusoidal areas as the M-5 but is arranged in a shorter and wider format, making it particularly useful when the complete array is to be imaged at one time.The overall size of the array is 70mm x 46mm; centered on an 8.5 inch (215mm) strip of 70mm film, which can also be mounted in glass (TM-G variations) at each modulation (-35, -60, -80).

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SINE M-7 Sinusoidal Array

Applied Image, Inc.

The Sinusoidal Array SINE M-7 has an image size of 22mm x 30mm which makes it small enough to fit into a standard 35mm projection frame. The gray scale is contained in the outer rows. It is made on 35mm perforated film.The TM-G variations are produced on a wider film (without perforations) and cemented between glass. They are available at each modulation (-35, -60, -80).

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SINE Sinusoidal Vision Demonstration Array

Applied Image, Inc.

The Sinusoidal Visual Demonstration Array is designed to demonstrate the Modulation Transfer Function (MTF) of the human eye. Its transmittance varies sinusoidally and increases in spatial frequency from 0.2 to 20 c/mm, following a logrithmic scale. The modulation increases linearly from top to bottom. One can see, in the image, where the visual contrast contour disappears which is the MTF of the eye. Ideally suited for teaching and demonstration, the Array is available on film mounted in glass (-G), or mounted in a 2″x 2″ projection slide.(-SL)

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