Thanks Su. Hello, everyone. Thank you for joining us. Now I know many of you are used to hearing Dr. Bob Shillman kick off all calls. We will miss him following his retirement as Chairman of Cognex's Board of Directors. If he were joining us today, he would probably say wow, what a quarter. For me, I'll start with we are pleased with our strong start to 2021. Cognex reported record first quarter revenue, net income and earnings per share. Were also highly profitable reporting an after tax margin of 29%, demonstrating the substantial leverage we have in our business model. Most importantly, we're feeling more positive about business activity overall than we have in many months. Revenue for Q1 was $239 million and in the top half of our expected range. The growth rate year-on- year was 43%, the third quarter in a row in which revenue grew by more than 30% year-on-year. Revenue also increased on a sequential basis, which is contrary to our typical seasonal experience. The biggest contributor to growth was logistics, which for the first time in our history was our largest end market. We reported another record revenue quarter in logistics due to continued strong demand for the e-commerce sector. Notably, we believe the strength we have been experiencing is broadening sectors that struggled in 2020 such as brick-and-mortar retail and airport baggage handling are beginning to invest again. Revenue from most manufacturing industries increased meaningfully year-on-year. Highlights include automotive, which grew quicker than expected and at the fastest rate in some time. Consumer products and food and beverage picked up noticeably. Medical related industries and semi continue to be strong. Consumer Electronics also grew year-on-year in Q1. As many of you are anticipating we're ready to share our view of this year spending cycle. For 2021, we believe revenue for consumer electronics will be modestly below the level we reported last year. This follows a very good year in 2020, during which consumer electronics was Cognex's the largest industry and grew by about 30% over 2019. We expect less investment in smartphone manufacturing and then devices needed for online learning and working from home. As for timing, we believe Q3 will be our largest revenue generating quarter for consumer electronics. However, in Q3 this year, we expect a lower concentration of electronics revenue than we saw in Q3 of last year. Moving now to our supply chain, the team continues to do a good job navigating a difficult environment. Supply chains are under pressure for most companies, including Cognex because of increased customer demand, lengthening component lead times, some vendors struggling to supply parts, elevated freight costs and COVID concerns, our close relationships with suppliers and our practice of holding substantial component inventory are helping us manage well through these challenges. Let's talk next about new products development. Since the start of the year, we introduced three powerful next generation platforms that we've been working on for a number of years. First is the In-Sight 3D-L4000 which we discussed on February call. This exciting new smart camera platform leverages insights widely used spreadsheet interface for the fast growing industrial 3D vision markets. We believe the L4000 is a breakthrough product that makes Cognex's industry leading true 3D vision tools as easy to use as 2D. As one customer summed up nicely, a new application can be up and running in minutes. The L4000 positions us very effectively against some of our competitors who have significant sales and profits in 3D vision. Second, we launched the DataMan 8700 series, our next generation of industrial handheld barcode readers. The 8700 series reasserts our technology leadership for handheld barcode reading in automotive, medical devices, electronics and other industries. Customers tell us its speed and accuracy in reading the most difficult codes at some metal and other surfaces leapfrogs the other products available today. Oil resistance, robust industrial protocols, wireless communication options and a built in OLED display are all key differentiators for our new range of handheld readers. Third, we introduced an edge platform for extracting more value from the millions of digital images generated daily by Cognex products. Cognex edge intelligence or EI helps customers understand the performance of devices deployed across facilities, quickly identify issues and take corrective action. We held extensive beta trials in EI with some of the world's largest logistics and consumer products companies. They praised the EI's ability to reduce costly downtime, provide immediate actionable quality data and improve productivity. EI also easily integrates with industry 4.0 solutions from larger automation companies providing access to valuable factory data for predictive analytics. I'm proud of the team's success introducing these products during COVID. Our first virtual launch about a year ago at the start of the pandemic was the In-Sight D900 deep learning smart camera. Today we're successfully launching new products, training our sales engineers, distributor partners and customers and holding technical discussions, trade shows, product demonstrations, virtually. We're winning a lot of business in this manner and intend to continue to do so in 2021 and beyond. Cognex continue to work productively together and with our customers, partners and vendors. Even though it's encouraging the life and most of our markets is starting to improve. We look forward to collaborating more in person as the world moves beyond the pandemic. Now, I'll hand the call over to Paul for details of the quarter.