Chromatic aberration - chromatic aberration glasses

 2024-11-25 03:26:53

Step 3: Switch to the corresponding collimator when necessary. Connect the light source and stepper motor at the same time to set up.

We have a couple older CNC machines that use rs232. The onboard storage is very small so they will request the file in chunks from the host PC. I want to update there computers but with phasing out of serial ports, my best option is a USB to serial adapter. Is this a viable option for machines that require this connection to run for hours at a time?

In addition to lowering your latency time, I also recommend disabling the Selective Suspend option for your cable. The Selective Suspend option allows Windows to put your hardware to sleep, which can result in corrupt data packets. To disable the Selective Suspend option, clear the checkbox for the Enable Selective Suspend field on the Advanced Settings window for your device.

Step 6: Adjust the “Slide Mot” parameter to adjust the sample stand’s height, ensuring the entrance pupil of the sample lens in the center of the collimator’s swing arm.

RS232toUSB-C

Learning about the common issues with USB to RS-232 adapter cables was incredibly helpful for me. As someone who relies on these adapters for data logging, understanding their limitations and troubleshooting tips is invaluable. Thank you for sharing this informative article

Step 8: Under “Relative Illumination” button, adjusting “Focus” parameter and sample position to ensure that CCD is on image plane, and receives the generated image. As examples shown, if the image is black representing no energy is received at this position, operator needs to re-adjust, until the image turns into red, representing sufficient energy is received.

adityamathur, the blog author asked that I post this response to you: "That problem sounds like a driver issue. Contact the cable manufacturer for technical support. Years ago, Campbell Scientific switched from Prolific chips to FTDI for better driver support."

Newer data logger designs, such as the CR6, feature a native USB connection. Many devices, however, will feature RS-232 connections for years to come, and we’ll need to continue using USB to RS-232 adapter cables. I hope the suggestions I’ve provided help. Feel free to share any USB to RS-232 issues that you have encountered by posting a comment below.

It is recommended to only use cables with FTDI chips for connecting to Campbell Scientific equipment. The cost difference in cables is very small.

I have seen several cases where old cables could no longer handle 115200 baud, but the cables still worked on low baud rates. There have been many more cases where a USB cable stopped working half-way through a day in the field.

I have an issue where my prolific USB to Serial adapter stopped being detected as 'n "Ports (Com & LPT)" device. It keeps on detecting it is a " USB Composite" device, even after installing the correct Windows drivers downloaded directly from the manufacturer's website. Uninstalling it and reinstalling it doesn't help. I get the same result on another computer also running Windows 10. It simply refuses to recognize the adapter as a USB to Serial device anymore and keeps on detecting it as a "USB Composite" device as soon as you plug it in after uninstalling it and restarting Windows. Windows also claims that it finds no better driver than the one currently installed when doing a driver search, even after installing the manufacturer drivers. So what do I do? How do I get the adapter to be recognized correctly? What I don't understand, is that it worked fine, then all of a sudden started to detect it as a workable "USB Composite Device". Any advice, please? Thank you.

Avantier has ImageMaster® TriOptics MTF Stations in-house, with the capability to handle MTF testing, enabling the precise determination of the imaging quality of lenses and optical systems.

For such an application, I would recommend spending extra to buy an industrial rated interface with electrical isolation. For PCs that have card slots, you can purchase RS232 cards. Industrial models are available with electrical protection built in.

RS232to USBadapter driver

Step 4: Place sample lens in place, where above image plane, and beneath light source, while turning on stepper motor and light source.

Have you had difficulty using a USB to RS-232 adapter to connect your RS-232 device to a computer? If so, you are not alone. Our customers frequently encounter issues with these adapters. In this article, I’ll briefly discuss the origin of these issues and provide you with some suggestions for successfully handling them.

This article is incredibly insightful! It helped me understand the complexities and potential pitfalls of USB-RS232 adapter cables. Thanks for shedding light on these issues.

The driver for FTDI chips allows you to lower the latency time on packets. To do this, you can use the Latency Timer field, which is accessed through the Windows Device Manager. Follow these steps:

RS232to USBpinout

Tip: Test your USB adapters in the office with your field computer. When you are in the field, your computer won’t have an Internet connection to automatically download and install the driver.

Step 9: Switch to corresponded sample EFL and wavelength under “measurement range” page, cross wire will be shown in the display area. Avantier has abundant filters in stock making sure broad range of wavelengths can be measured at this stage.

With an in-house ImageMaster® HR MTF station, Avantier is able to provide an outstanding level of accuracy and flexibility in testing the MTF. Following is the common procedure to measure MTF for an optical lens assembly.

Step 1: Equip with collimators with different EFL (50mm/300mm/500mm), Avantier is available to measure according to different customers’ requirements.

Tip: If your field site is far from your office, take two USB to RS-232 cables with you. Lost time in the field can be a lot more costly than the purchase price of a second cable.

USB devices have high throughput, but they use a shared data bus. Data is wrapped up and transferred in packets. To handle the packets and move data in and out of the program accessing the USB device, a software driver is needed. The software driver sits between the hardware and the computer program you are using, and it must be installed and working correctly.

Hi,I'm facing a weird problem with my USB to serial-adapter. The adapter has a Prolific-2303 chipset. The COM port is not getting detected by the Windows 7 laptop.I've installed the drivers and restarted the computer after installing the drivers.I've run the driver update from the device manager and updated the drivers.I also tried to install the COM port manually from the device manager.I checked the adapter by connecting it to another desktop computer and the COM port is getting detected. I don't understand why the ports are detected on one computer but not on another. Please help me identify the problem. Thank you!

The drivers provided by Prolific do not allow adjusting the latency. It is recommended to only use cables with FTDI chips for connecting to Campbell Scientific equipment. The cost difference in cables is very small.

Step 11: Input corresponded line number and edited txt document under “MTF vs Field” page to generate the complete testing curve.

If the driver for your adapter is not automatically installed or cannot be installed from a CD, you will need to identify the chip in your cable and locate the driver on the Internet. Some manufacturers identify on their packaging which chip is used inside their cable. You can also identify a cable’s chip from the Windows Device Manager by following these steps:

USB to RS-232 adapters are commodity pieces of computer equipment. As much as we all wish that everything was as reliable as the CR1000, all adapter cables eventually fail.

I get the same result on another computer also running Windows 10. It simply refuses to recognize the adapter as a USB to Serial device anymore and keeps on detecting it as a "USB Composite" device as soon as you plug it in after uninstalling it and restarting Windows. Windows also claims that it finds no better driver than the one currently installed when doing a driver search, even after installing the manufacturer drivers.

For USB to RS-232 chips, there are two primary manufacturers: Prolific and FTDI. Because off-brand chips with poor drivers are unreliable, Campbell Scientific recommends and currently sells a cable using an FTDI chip (part number 17394). We chose this cable because it uses a chip that has a certified driver available on Windows Update. (The older cables were silver in color and did not have a driver available for Windows beyond version 7.)

In 1996, the Universal Serial Bus (USB) standard was introduced as a replacement for the serial connector and other connector types that were typically found on the back of computers. The USB provided smaller connectors and more data throughput than the serial and parallel interfaces it replaced.

It establishes the correlation between the output and input within an optical system and stands as the most comprehensive method for such an evaluation, it involves various parameters, including resolution, sensitivity, physical geometry, and noise. Alternatively expressed in cycles, lines, or line pairs per millimeter, MTF can be measured for both lens components and optical assembly.

RS485to USB

This blog post is incredibly helpful in understanding the common issues with USB to RS-232 adapter cables. The troubleshooting tips provided will definitely assist in resolving connection problems I’ve encountered

The most common problem that our customers encounter with a USB to RS-232 adapter is getting the proper driver installed. The driver must correspond to the chip inside the cable—not to the manufacturer of the cable.

Step 7: Adjust the “Focus” parameter to adjust CCD’s height. Based on BFL of the lens, it determines how close the CCD to the image plane.

USB toSerial Converter

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Below are MTF plots and tables of one of our 20X customized objective lenses. With Avantier’s design and manufacturing capabilities, we can fully meet customer’s requirements, as shown in result of MTF measured at from 100lp/mm to 400lp/mm in both tangential and sagittal directions.

Understanding the challenges with USB to RS-232 adapter cables was really helpful. This article clarified the issues I've been facing and provided practical solutions that I can apply.

Although there are two primary companies that manufacture USB to RS-232 adapter chips, there are many cable manufacturers who offer varying levels of cable quality.

Modulation Transfer Function (MTF) is a fundamental concept in optics and image quality assessment that quantifies how well a lens system is able to reproduce various spatial frequencies in an image.

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"That problem sounds like a driver issue. Contact the cable manufacturer for technical support. Years ago, Campbell Scientific switched from Prolific chips to FTDI for better driver support."

RS232to USBB

RS232to USBconverter for CNC

RS232to USBFemale

While USB to RS-232 adapters perform a necessary function, they do have some limitations. For example, there are three types of problems that you may encounter when using a USB to RS-232 adapter:

In the old days of personal computers, one of the primary connections available was the RS-232 serial port. Apart from the parallel port, it was the primary means to connect an external device. The connector was reduced from a 25-pin connector to a 9-pin connector, but RS-232 ports remained present on every computer for many years. Built-in RS-232 ports featured direct mapping to memory and worked at a high priority. Data practically flowed directly to and from the software that was accessing the serial port.

For further services, MTF testing data will be provided to the optical system and assemblies’ deliveries, and optical components upon request.

What I don't understand, is that it worked fine, then all of a sudden started to detect it as a workable "USB Composite Device". Any advice, please?

Step 2: Select whether the testing sample is an infinite or finite conjugate lens and focal length, enables to test on various lenses.

With the widespread adoption of USB, most computers sold now do not have an RS-232 port. Therefore, to connect an RS-232 device (such as a CR1000) to a computer, you need to use a USB to RS-232 adapter, such as the 17394 converter.

This article is incredibly informative! It helped me better understand the issues with USB-RS232 adapter cables and provided practical solutions to troubleshoot them. Thank you for the clear explanations.

This article is incredibly insightful! It helped me understand the complexities and potential pitfalls of USB-RS232 adapter cables. Thanks for shedding light on these issues.

In summary, the objective lens MTF testing is an indispensable process at the heart of Avantier’s optical manufacturing prowess. Through rigorous MTF analysis, we gain deep insights into the true capabilities of our lenses, ensuring they meet the highest standards of contrast, sharpness, and resolution. This commitment to precision and quality defines Avantier’s dedication to delivering optical solutions that empower industries and push the boundaries of clarity and performance.

As mentioned previously, USB uses a shared data bus with packetized communication. The packetized communication introduced some latency (data transfer time) that wasn’t present with built-in RS-232 ports. Unfortunately, latency makes a noticeable difference when you download large amounts of data or upload a new operating system.