Thousand Oaks-based Teledyne Technologies is back in acquisition mode.

This month, the defense conglomerate made up of dozens of companies has bought two more: Optimum Optical Systems, a Camarillo firm that will complement Teledyne’s infrared imaging systems for unmammned aerial vehicles; and Intelek, a United Kingdom mini-conglomerate that makes electronic systems for satellite communications.

Teledyne didn’t release details of the Optimum Optical deal, but it said the aggregate value of the Intelek transaction will total about $52 million once stock options, net debt and pension deficits are taken into account.

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