Robert Mehrabian
Analyst · Keybanc Capital Markets
Thank you, Jason, and good morning everyone. First quarter sales of $494 million increased 5.5%. Earnings per share from continuing operations was $0.96 compared to $0.87 in 2011. As we have progressively done over the last decade, we continued our emphasis on higher margin industrial growth markets, increased our global presence, and like always, further pushed continuous improvement in our operations.
Our current portfolio of higher technology businesses, provide proprietary, highly engineered products and served markets, which has energy exploration and production, global infrastructure, factory automation, transportation, and communication. In order to drive organic growth in this market, we continue to invest in research and development. In fact R&D expense increased 20 % compared to last year.
In the first quarter, we received record orders of $528 million excluding acquired backlog. Overall, book-to-bill was 1.07. And despite our greater mix of short cycle businesses, backlog was approximately $990 million compared to approximately $945 million at 2011 fiscal year end.
International sales contributed more than 40% of total revenue in the quarter. And U.S. government sales accounted for just 31% of sales, down from 36% in 2011, and 47% just a few years ago. The profile of our government businesses also continues to evolve with an increase in proprietary products over engineering services.
Finally, given the greater profitability of our commercial businesses, the U.S. government in the first quarter accounted for only about 20% of income.
I will now comment on our business segment, after which Dale Schnittjer will review some of the financials in more detail and provide an earnings outlook for the second quarter and full year 2012.
Starting with our instrumentation segment, this segment comprises our highest margin group of businesses and primarily serves the offshore energy including deep water exploration and production and global infrastructure markets. International sales represented more than 55% of the segment sales in the first quarter. Despite a tough year-over-year comparison, first quarter sales in the instrumentation segment increased slightly to $160.6 million. Sales however increased 7.9% sequentially compared to 4th quarter of 2011.
Record sales of environmental instruments grew 10% year-over-year, while sales of marine instrumentation contracted slightly.
Growth in environmental instrument continued due in part from increased power and petrochemical activity in Asia, Russia, and the Middle East. While marine instruments declined slightly year-over-year, this was largely timings related. We experienced good sequential growth of 8.8%.
In the deep water oil production market we announced in January that our oil and gas group was awarded a 3 year global frame agreement with FMC Technologies to supply wide portfolio of interconnect and sensing products and services in support of FMC's offshore oil and gas business. In March, FMC was awarded a $1.5 billion agreement for subsea trees and equipment from Petrobras of Brazil. Given our frame agreement with FMC and our 11 years local presence in the Brazilian market, we expect that this will provide an excellent opportunity for Teledyne over the next several years.
Turning to the Digital Imaging segment, this segment provides a broad portfolio of visible, infrared, x-ray and ultraviolet sensors, cameras and software. First quarter sales, in Digital Imaging increased 42%, compared to last year. Most of the revenue growth was due to the full year result of DALSA, which was acquired in February 2011. However, revenue growth excluding DALSA was 7.5%.
Segment operating profit increased, but operating margin was compacted by one, 270 basis points of increased R&D spending compared to last year. Two, approximately 325 basis points of acquisition related intangible asset amortization. And 3, the reclassification of Canadian R&D tax credit from above the line segment income to below the line provision for taxes.
The non-DALSA revenue growth resulted from increased sales related to classified imaging program, greater achievement of laser eye protection glasses, and sales of new mid-wave UAV disc, tactical imaging cameras.
Immediately after the end of the quarter, we increased our ownership interest in Optech Incorporated from 19% to 51%. Optech provides full integrated light detection and ranging or lidar system and camera imaging solution used in airborne terrestrial mapping, airborne laser bathymetry, mobile mapping, and laser imaging.
Turning to our Aerospace and Defense Electronics segment, first quarter sales decreased 1.3% compared to first quarter of 2011. However sales of high margin commercial avionics, aircraft batteries, and electronic relays increased almost 15%. There is a microwave device as and interconnects were stable and increased modestly due to the acquisition of VariSystems. The decline in the segment sales resulted from significantly decreased revenue of low margin government electronic manufacturing services. Given the improved mix, segment operating profit increased 6% and segment operating margin increased 95 basis points.
Within this segment, U.S. government sales were 36% of total, down from 45% in 2011 and almost 50% in 2009. The acquisition of VariSystems during the quarter was another example of our focus on expanding our portfolio of commercial products for industrial growth market such as the oil and gas industry.
Turning to the Engineered System segment, first quarter revenue and margins declined slightly given the anticipated reduction with systems engineering and technical assistance program, as a result of U.S. government budget cuts, and a revised organizational conflict of interest policy, partially offset by increased manufacturing work for marine, aerospace and industrial applications. We believe that government sales in this segment have largely stabilized due in part to revenue now been generated from nearly $1 billion of major contracts won in 2011.
In conclusion, we now have a portfolio of high technology industrial businesses and we continue to increase our international presence. While the government portion of our earnings has also decreased to only 20%.
Finally, we also have a proven track record of earnings improvement, and we expect 2012 to be our 11th consecutive year of GAAP earnings growth.
I will now turn the call over to Dale Schnittjer.